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Nechaeva T, Verra L, Pucek J, Ranc L, Bergamaschi M, Zevi Della Porta G, Muggli P, Agnello R, Ahdida CC, Amoedo C, Andrebe Y, Apsimon O, Apsimon R, Arnesano JM, Bencini V, Blanchard P, Burrows PN, Buttenschön B, Caldwell A, Chung M, Cooke DA, Davut C, Demeter G, Dexter AC, Doebert S, Farmer J, Fasoli A, Fonseca R, Furno I, Granados E, Granetzny M, Graubner T, Grulke O, Gschwendtner E, Guran E, Henderson J, Kedves MÁ, Kim SY, Kraus F, Krupa M, Lefevre T, Liang L, Liu S, Lopes N, Lotov K, Martinez Calderon M, Mazzoni S, Moon K, Morales Guzmán PI, Moreira M, Okhotnikov N, Pakuza C, Pannell F, Pardons A, Pepitone K, Poimenidou E, Pukhov A, Rey S, Rossel R, Saberi H, Schmitz O, Senes E, Silva F, Silva L, Spear B, Stollberg C, Sublet A, Swain C, Topaloudis A, Torrado N, Turner M, Velotti F, Verzilov V, Vieira J, Welsch C, Wendt M, Wing M, Wolfenden J, Woolley B, Xia G, Yarygova V, Zepp M. Hosing of a Long Relativistic Particle Bunch in Plasma. Phys Rev Lett 2024; 132:075001. [PMID: 38427892 DOI: 10.1103/physrevlett.132.075001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/08/2023] [Accepted: 01/16/2024] [Indexed: 03/03/2024]
Abstract
Experimental results show that hosing of a long particle bunch in plasma can be induced by wakefields driven by a short, misaligned preceding bunch. Hosing develops in the plane of misalignment, self-modulation in the perpendicular plane, at frequencies close to the plasma electron frequency, and are reproducible. Development of hosing depends on misalignment direction, its growth on misalignment extent and on proton bunch charge. Results have the main characteristics of a theoretical model, are relevant to other plasma-based accelerators and represent the first characterization of hosing.
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Affiliation(s)
- T Nechaeva
- Max Planck Institute for Physics, 80805 Munich, Germany
| | - L Verra
- CERN, 1211 Geneva 23, Switzerland
| | - J Pucek
- Max Planck Institute for Physics, 80805 Munich, Germany
| | - L Ranc
- Max Planck Institute for Physics, 80805 Munich, Germany
| | - M Bergamaschi
- Max Planck Institute for Physics, 80805 Munich, Germany
| | - G Zevi Della Porta
- Max Planck Institute for Physics, 80805 Munich, Germany
- CERN, 1211 Geneva 23, Switzerland
| | - P Muggli
- Max Planck Institute for Physics, 80805 Munich, Germany
| | - R Agnello
- Ecole Polytechnique Federale de Lausanne (EPFL), Swiss Plasma Center (SPC), 1015 Lausanne, Switzerland
| | | | - C Amoedo
- CERN, 1211 Geneva 23, Switzerland
| | - Y Andrebe
- Ecole Polytechnique Federale de Lausanne (EPFL), Swiss Plasma Center (SPC), 1015 Lausanne, Switzerland
| | - O Apsimon
- University of Manchester M13 9PL, Manchester M13 9PL, United Kingdom
- Cockcroft Institute, Warrington WA4 4AD, United Kingdom
| | - R Apsimon
- Cockcroft Institute, Warrington WA4 4AD, United Kingdom
- Lancaster University, Lancaster LA1 4YB, United Kingdom
| | | | - V Bencini
- CERN, 1211 Geneva 23, Switzerland
- John Adams Institute, Oxford University, Oxford OX1 3RH, United Kingdom
| | - P Blanchard
- Ecole Polytechnique Federale de Lausanne (EPFL), Swiss Plasma Center (SPC), 1015 Lausanne, Switzerland
| | - P N Burrows
- John Adams Institute, Oxford University, Oxford OX1 3RH, United Kingdom
| | - B Buttenschön
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - A Caldwell
- Max Planck Institute for Physics, 80805 Munich, Germany
| | - M Chung
- UNIST, Ulsan 44919, Republic of Korea
| | | | - C Davut
- University of Manchester M13 9PL, Manchester M13 9PL, United Kingdom
- Cockcroft Institute, Warrington WA4 4AD, United Kingdom
| | - G Demeter
- Wigner Research Centre for Physics, 1121 Budapest, Hungary
| | - A C Dexter
- Cockcroft Institute, Warrington WA4 4AD, United Kingdom
- Lancaster University, Lancaster LA1 4YB, United Kingdom
| | | | - J Farmer
- Max Planck Institute for Physics, 80805 Munich, Germany
| | - A Fasoli
- Ecole Polytechnique Federale de Lausanne (EPFL), Swiss Plasma Center (SPC), 1015 Lausanne, Switzerland
| | - R Fonseca
- ISCTE - Instituto Universitéario de Lisboa, 1049-001 Lisbon, Portugal
- GoLP/Instituto de Plasmas e Fusáo Nuclear, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisbon, Portugal
| | - I Furno
- Ecole Polytechnique Federale de Lausanne (EPFL), Swiss Plasma Center (SPC), 1015 Lausanne, Switzerland
| | | | - M Granetzny
- University of Wisconsin, Madison, Wisconsin 53706, USA
| | - T Graubner
- Philipps-Universität Marburg, 35032 Marburg, Germany
| | - O Grulke
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
- Technical University of Denmark, 2800 Kgs. Lyngby, Denmark
| | | | - E Guran
- CERN, 1211 Geneva 23, Switzerland
| | - J Henderson
- Cockcroft Institute, Warrington WA4 4AD, United Kingdom
- STFC/ASTeC, Daresbury Laboratory, Warrington WA4 4AD, United Kingdom
| | - M Á Kedves
- Wigner Research Centre for Physics, 1121 Budapest, Hungary
| | - S-Y Kim
- CERN, 1211 Geneva 23, Switzerland
- UNIST, Ulsan 44919, Republic of Korea
| | - F Kraus
- Philipps-Universität Marburg, 35032 Marburg, Germany
| | - M Krupa
- CERN, 1211 Geneva 23, Switzerland
| | | | - L Liang
- University of Manchester M13 9PL, Manchester M13 9PL, United Kingdom
- Cockcroft Institute, Warrington WA4 4AD, United Kingdom
| | - S Liu
- TRIUMF, Vancouver, British Columbia V6T 2A3, Canada
| | - N Lopes
- GoLP/Instituto de Plasmas e Fusáo Nuclear, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisbon, Portugal
| | - K Lotov
- Budker Institute of Nuclear Physics SB RAS, 630090 Novosibirsk, Russia
- Novosibirsk State University, 630090 Novosibirsk, Russia
| | | | | | - K Moon
- UNIST, Ulsan 44919, Republic of Korea
| | | | - M Moreira
- GoLP/Instituto de Plasmas e Fusáo Nuclear, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisbon, Portugal
| | - N Okhotnikov
- Budker Institute of Nuclear Physics SB RAS, 630090 Novosibirsk, Russia
- Novosibirsk State University, 630090 Novosibirsk, Russia
| | - C Pakuza
- John Adams Institute, Oxford University, Oxford OX1 3RH, United Kingdom
| | | | | | - K Pepitone
- Angstrom Laboratory, Department of Physics and Astronomy, 752 37 Uppsala, Sweden
| | | | - A Pukhov
- John Adams Institute, Oxford University, Oxford OX1 3RH, United Kingdom
- Heinrich-Heine-Universität Düsseldorf, 40225 Düsseldorf, Germany
| | - S Rey
- CERN, 1211 Geneva 23, Switzerland
| | - R Rossel
- CERN, 1211 Geneva 23, Switzerland
| | - H Saberi
- University of Manchester M13 9PL, Manchester M13 9PL, United Kingdom
- Cockcroft Institute, Warrington WA4 4AD, United Kingdom
| | - O Schmitz
- University of Wisconsin, Madison, Wisconsin 53706, USA
| | - E Senes
- CERN, 1211 Geneva 23, Switzerland
| | - F Silva
- INESC-ID, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisbon, Portugal
| | - L Silva
- GoLP/Instituto de Plasmas e Fusáo Nuclear, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisbon, Portugal
| | - B Spear
- John Adams Institute, Oxford University, Oxford OX1 3RH, United Kingdom
| | - C Stollberg
- Ecole Polytechnique Federale de Lausanne (EPFL), Swiss Plasma Center (SPC), 1015 Lausanne, Switzerland
| | - A Sublet
- CERN, 1211 Geneva 23, Switzerland
| | - C Swain
- Cockcroft Institute, Warrington WA4 4AD, United Kingdom
- University of Liverpool, Liverpool L69 7ZE, United Kingdom
| | | | - N Torrado
- CERN, 1211 Geneva 23, Switzerland
- GoLP/Instituto de Plasmas e Fusáo Nuclear, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisbon, Portugal
| | - M Turner
- CERN, 1211 Geneva 23, Switzerland
| | | | - V Verzilov
- TRIUMF, Vancouver, British Columbia V6T 2A3, Canada
| | - J Vieira
- GoLP/Instituto de Plasmas e Fusáo Nuclear, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisbon, Portugal
| | - C Welsch
- Cockcroft Institute, Warrington WA4 4AD, United Kingdom
- University of Liverpool, Liverpool L69 7ZE, United Kingdom
| | - M Wendt
- CERN, 1211 Geneva 23, Switzerland
| | - M Wing
- UCL, London WC1 6BT, United Kingdom
| | - J Wolfenden
- Cockcroft Institute, Warrington WA4 4AD, United Kingdom
- University of Liverpool, Liverpool L69 7ZE, United Kingdom
| | | | - G Xia
- University of Manchester M13 9PL, Manchester M13 9PL, United Kingdom
- Cockcroft Institute, Warrington WA4 4AD, United Kingdom
| | - V Yarygova
- Budker Institute of Nuclear Physics SB RAS, 630090 Novosibirsk, Russia
- Novosibirsk State University, 630090 Novosibirsk, Russia
| | - M Zepp
- University of Wisconsin, Madison, Wisconsin 53706, USA
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Fornal T, Kubkowska M, Książek I, Książek K, Romba T, Burhenn R, Buttenschön B, Ford O, Vano L. Effect of spatial distribution of impurity ions on the signal of ‘C/O monitor for Wendelstein 7-X’ - an indicator of plasma wall interactions. Nuclear Materials and Energy 2022. [DOI: 10.1016/j.nme.2022.101272] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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3
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Verra L, Zevi Della Porta G, Pucek J, Nechaeva T, Wyler S, Bergamaschi M, Senes E, Guran E, Moody JT, Kedves MÁ, Gschwendtner E, Muggli P, Agnello R, Ahdida CC, Goncalves MCA, Andrebe Y, Apsimon O, Apsimon R, Arnesano JM, Bachmann AM, Barrientos D, Batsch F, Bencini V, Blanchard P, Burrows PN, Buttenschön B, Caldwell A, Chappell J, Chevallay E, Chung M, Cooke DA, Davut C, Demeter G, Dexter AC, Doebert S, Elverson FA, Farmer J, Fasoli A, Fedosseev V, Fonseca R, Furno I, Gorn A, Granados E, Granetzny M, Graubner T, Grulke O, Hafych V, Henderson J, Hüther M, Khudiakov V, Kim SY, Kraus F, Krupa M, Lefevre T, Liang L, Liu S, Lopes N, Lotov K, Martinez Calderon M, Mazzoni S, Medina Godoy D, Moon K, Morales Guzmán PI, Moreira M, Nowak E, Pakuza C, Panuganti H, Pardons A, Pepitone K, Perera A, Pukhov A, Ramjiawan RL, Rey S, Schmitz O, Silva F, Silva L, Stollberg C, Sublet A, Swain C, Topaloudis A, Torrado N, Tuev P, Velotti F, Verzilov V, Vieira J, Weidl M, Welsch C, Wendt M, Wing M, Wolfenden J, Woolley B, Xia G, Yarygova V, Zepp M. Controlled Growth of the Self-Modulation of a Relativistic Proton Bunch in Plasma. Phys Rev Lett 2022; 129:024802. [PMID: 35867433 DOI: 10.1103/physrevlett.129.024802] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/25/2022] [Accepted: 05/12/2022] [Indexed: 06/15/2023]
Abstract
A long, narrow, relativistic charged particle bunch propagating in plasma is subject to the self-modulation (SM) instability. We show that SM of a proton bunch can be seeded by the wakefields driven by a preceding electron bunch. SM timing reproducibility and control are at the level of a small fraction of the modulation period. With this seeding method, we independently control the amplitude of the seed wakefields with the charge of the electron bunch and the growth rate of SM with the charge of the proton bunch. Seeding leads to larger growth of the wakefields than in the instability case.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | | | | | | | - R Agnello
- Ecole Polytechnique Federale de Lausanne (EPFL), Swiss Plasma Center (SPC), 1015 Lausanne, Switzerland
| | | | | | - Y Andrebe
- Ecole Polytechnique Federale de Lausanne (EPFL), Swiss Plasma Center (SPC), 1015 Lausanne, Switzerland
| | - O Apsimon
- University of Liverpool, Liverpool L69 7ZE, United Kingdom
- Cockcroft Institute, Warrington WA4 4AD, United Kingdom
| | - R Apsimon
- Cockcroft Institute, Warrington WA4 4AD, United Kingdom
- Lancaster University, Lancaster LA1 4YB, United Kingdom
| | | | - A-M Bachmann
- Max Planck Institute for Physics, 80805 Munich, Germany
| | | | - F Batsch
- Max Planck Institute for Physics, 80805 Munich, Germany
| | - V Bencini
- CERN, 1211 Geneva 23, Switzerland
- John Adams Institute, Oxford University, Oxford OX1 3RH, United Kingdom
| | - P Blanchard
- Ecole Polytechnique Federale de Lausanne (EPFL), Swiss Plasma Center (SPC), 1015 Lausanne, Switzerland
| | - P N Burrows
- John Adams Institute, Oxford University, Oxford OX1 3RH, United Kingdom
| | - B Buttenschön
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - A Caldwell
- Max Planck Institute for Physics, 80805 Munich, Germany
| | | | | | - M Chung
- UNIST, Ulsan 44919, Republic of Korea
| | | | - C Davut
- Cockcroft Institute, Warrington WA4 4AD, United Kingdom
- University of Manchester, Manchester M13 9PL, United Kingdom
| | - G Demeter
- Wigner Research Centre for Physics, 1121 Budapest, Hungary
| | - A C Dexter
- Cockcroft Institute, Warrington WA4 4AD, United Kingdom
- Lancaster University, Lancaster LA1 4YB, United Kingdom
| | | | | | - J Farmer
- CERN, 1211 Geneva 23, Switzerland
- Max Planck Institute for Physics, 80805 Munich, Germany
| | - A Fasoli
- Ecole Polytechnique Federale de Lausanne (EPFL), Swiss Plasma Center (SPC), 1015 Lausanne, Switzerland
| | | | - R Fonseca
- ISCTE-Instituto Universitéario de Lisboa, 1049-001 Lisbon, Portugal
- GoLP/Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisbon, Portugal
| | - I Furno
- Ecole Polytechnique Federale de Lausanne (EPFL), Swiss Plasma Center (SPC), 1015 Lausanne, Switzerland
| | - A Gorn
- Budker Institute of Nuclear Physics SB RAS, 630090 Novosibirsk, Russia
- Novosibirsk State University, 630090 Novosibirsk , Russia
| | | | - M Granetzny
- University of Wisconsin, Madison, Wisconsin 53706, USA
| | - T Graubner
- Philipps-Universität Marburg, 35032 Marburg, Germany
| | - O Grulke
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
- Technical University of Denmark, 2800 Kgs. Lyngby, Denmark
| | - V Hafych
- Max Planck Institute for Physics, 80805 Munich, Germany
| | - J Henderson
- Cockcroft Institute, Warrington WA4 4AD, United Kingdom
- Accelerator Science and Technology Centre, ASTeC, STFC Daresbury Laboratory, Warrington WA4 4AD, United Kingdom
| | - M Hüther
- Max Planck Institute for Physics, 80805 Munich, Germany
| | - V Khudiakov
- Budker Institute of Nuclear Physics SB RAS, 630090 Novosibirsk, Russia
- Heinrich-Heine-Universität Düsseldorf, 40225 Düsseldorf, Germany
| | - S-Y Kim
- CERN, 1211 Geneva 23, Switzerland
- UNIST, Ulsan 44919, Republic of Korea
| | - F Kraus
- Philipps-Universität Marburg, 35032 Marburg, Germany
| | - M Krupa
- CERN, 1211 Geneva 23, Switzerland
| | | | - L Liang
- Cockcroft Institute, Warrington WA4 4AD, United Kingdom
- University of Manchester, Manchester M13 9PL, United Kingdom
| | - S Liu
- TRIUMF, Vancouver, Canada
| | - N Lopes
- GoLP/Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisbon, Portugal
| | - K Lotov
- Budker Institute of Nuclear Physics SB RAS, 630090 Novosibirsk, Russia
- Novosibirsk State University, 630090 Novosibirsk , Russia
| | | | | | | | - K Moon
- UNIST, Ulsan 44919, Republic of Korea
| | | | - M Moreira
- GoLP/Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisbon, Portugal
| | - E Nowak
- CERN, 1211 Geneva 23, Switzerland
| | - C Pakuza
- John Adams Institute, Oxford University, Oxford OX1 3RH, United Kingdom
| | | | | | - K Pepitone
- Angstrom Laboratory, Department of Physics and Astronomy, 752 37 Uppsala, Sweden
| | - A Perera
- University of Liverpool, Liverpool L69 7ZE, United Kingdom
- Cockcroft Institute, Warrington WA4 4AD, United Kingdom
| | - A Pukhov
- Heinrich-Heine-Universität Düsseldorf, 40225 Düsseldorf, Germany
| | - R L Ramjiawan
- CERN, 1211 Geneva 23, Switzerland
- John Adams Institute, Oxford University, Oxford OX1 3RH, United Kingdom
| | - S Rey
- CERN, 1211 Geneva 23, Switzerland
| | - O Schmitz
- University of Wisconsin, Madison, Wisconsin 53706, USA
| | - F Silva
- INESC-ID, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisbon, Portugal
| | - L Silva
- GoLP/Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisbon, Portugal
| | - C Stollberg
- Ecole Polytechnique Federale de Lausanne (EPFL), Swiss Plasma Center (SPC), 1015 Lausanne, Switzerland
| | - A Sublet
- CERN, 1211 Geneva 23, Switzerland
| | - C Swain
- University of Liverpool, Liverpool L69 7ZE, United Kingdom
- Cockcroft Institute, Warrington WA4 4AD, United Kingdom
| | | | - N Torrado
- GoLP/Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisbon, Portugal
| | - P Tuev
- Budker Institute of Nuclear Physics SB RAS, 630090 Novosibirsk, Russia
- Novosibirsk State University, 630090 Novosibirsk , Russia
| | | | | | - J Vieira
- GoLP/Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisbon, Portugal
| | - M Weidl
- Max Planck Institute for Plasma Physics, 80805 Munich, Germany
| | - C Welsch
- University of Liverpool, Liverpool L69 7ZE, United Kingdom
- Cockcroft Institute, Warrington WA4 4AD, United Kingdom
| | - M Wendt
- CERN, 1211 Geneva 23, Switzerland
| | - M Wing
- UCL, London WC1 6BT, United Kingdom
| | - J Wolfenden
- University of Liverpool, Liverpool L69 7ZE, United Kingdom
- Cockcroft Institute, Warrington WA4 4AD, United Kingdom
| | | | - G Xia
- Cockcroft Institute, Warrington WA4 4AD, United Kingdom
- University of Manchester, Manchester M13 9PL, United Kingdom
| | - V Yarygova
- Budker Institute of Nuclear Physics SB RAS, 630090 Novosibirsk, Russia
- Novosibirsk State University, 630090 Novosibirsk , Russia
| | - M Zepp
- University of Wisconsin, Madison, Wisconsin 53706, USA
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Endler M, Baldzuhn J, Beidler C, Bosch HS, Bozhenkov S, Buttenschön B, Dinklage A, Fellinger J, Feng Y, Fuchert G, Gao Y, Geiger J, Grulke O, Hartmann D, Jakubowski M, König R, Laqua H, Lazerson S, McNeely P, Naujoks D, Neuner U, Otte M, Pasch E, Sunn Pedersen T, Perseo V, Puig Sitjes A, Rahbarnia K, Rust N, Schmitz O, Spring A, Stange T, von Stechow A, Turkin Y, Wang E, Wolf R. Wendelstein 7-X on the path to long-pulse high-performance operation. Fusion Engineering and Design 2021. [DOI: 10.1016/j.fusengdes.2021.112381] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Batsch F, Muggli P, Agnello R, Ahdida CC, Amoedo Goncalves MC, Andrebe Y, Apsimon O, Apsimon R, Bachmann AM, Baistrukov MA, Blanchard P, Braunmüller F, Burrows PN, Buttenschön B, Caldwell A, Chappell J, Chevallay E, Chung M, Cooke DA, Damerau H, Davut C, Demeter G, Deubner HL, Doebert S, Farmer J, Fasoli A, Fedosseev VN, Fiorito R, Fonseca RA, Friebel F, Furno I, Garolfi L, Gessner S, Gorgisyan I, Gorn AA, Granados E, Granetzny M, Graubner T, Grulke O, Gschwendtner E, Hafych V, Helm A, Henderson JR, Hüther M, Kargapolov IY, Kim SY, Kraus F, Krupa M, Lefevre T, Liang L, Liu S, Lopes N, Lotov KV, Martyanov M, Mazzoni S, Medina Godoy D, Minakov VA, Moody JT, Moon K, Morales Guzmán PI, Moreira M, Nechaeva T, Nowak E, Pakuza C, Panuganti H, Pardons A, Perera A, Pucek J, Pukhov A, Ramjiawan RL, Rey S, Rieger K, Schmitz O, Senes E, Silva LO, Speroni R, Spitsyn RI, Stollberg C, Sublet A, Topaloudis A, Torrado N, Tuev PV, Turner M, Velotti F, Verra L, Verzilov VA, Vieira J, Vincke H, Welsch CP, Wendt M, Wing M, Wiwattananon P, Wolfenden J, Woolley B, Xia G, Zepp M, Zevi Della Porta G. Transition between Instability and Seeded Self-Modulation of a Relativistic Particle Bunch in Plasma. Phys Rev Lett 2021; 126:164802. [PMID: 33961468 DOI: 10.1103/physrevlett.126.164802] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/18/2020] [Revised: 02/18/2021] [Accepted: 03/09/2021] [Indexed: 06/12/2023]
Abstract
We use a relativistic ionization front to provide various initial transverse wakefield amplitudes for the self-modulation of a long proton bunch in plasma. We show experimentally that, with sufficient initial amplitude [≥(4.1±0.4) MV/m], the phase of the modulation along the bunch is reproducible from event to event, with 3%-7% (of 2π) rms variations all along the bunch. The phase is not reproducible for lower initial amplitudes. We observe the transition between these two regimes. Phase reproducibility is essential for deterministic external injection of particles to be accelerated.
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Affiliation(s)
- F Batsch
- Max Planck Institute for Physics, Munich, Germany
| | - P Muggli
- Max Planck Institute for Physics, Munich, Germany
| | - R Agnello
- Ecole Polytechnique Federale de Lausanne (EPFL), Swiss Plasma Center (SPC), Lausanne, Switzerland
| | | | | | - Y Andrebe
- Ecole Polytechnique Federale de Lausanne (EPFL), Swiss Plasma Center (SPC), Lausanne, Switzerland
| | - O Apsimon
- Cockcroft Institute, Daresbury, United Kingdom
- University of Liverpool, Liverpool, United Kingdom
| | - R Apsimon
- Cockcroft Institute, Daresbury, United Kingdom
- Lancaster University, Lancaster, United Kingdom
| | - A-M Bachmann
- Max Planck Institute for Physics, Munich, Germany
| | - M A Baistrukov
- Novosibirsk State University, Novosibirsk, Russia
- Budker Institute of Nuclear Physics SB RAS, Novosibirsk, Russia
| | - P Blanchard
- Ecole Polytechnique Federale de Lausanne (EPFL), Swiss Plasma Center (SPC), Lausanne, Switzerland
| | | | - P N Burrows
- John Adams Institute, Oxford University, Oxford, United Kingdom
| | - B Buttenschön
- Max Planck Institute for Plasma Physics, Greifswald, Germany
| | - A Caldwell
- Max Planck Institute for Physics, Munich, Germany
| | - J Chappell
- University College London, London, United Kingdom
| | | | - M Chung
- Ulsan National Institute of Science and Technology, Ulsan, Republic of Korea
| | - D A Cooke
- University College London, London, United Kingdom
| | | | - C Davut
- Cockcroft Institute, Daresbury, United Kingdom
- University of Manchester, Manchester, United Kingdom
| | - G Demeter
- Wigner Research Center for Physics, Budapest, Hungary
| | - H L Deubner
- Philipps-Universität Marburg, Marburg, Germany
| | | | - J Farmer
- Max Planck Institute for Physics, Munich, Germany
- CERN, Geneva, Switzerland
| | - A Fasoli
- Ecole Polytechnique Federale de Lausanne (EPFL), Swiss Plasma Center (SPC), Lausanne, Switzerland
| | | | - R Fiorito
- Cockcroft Institute, Daresbury, United Kingdom
- University of Liverpool, Liverpool, United Kingdom
| | - R A Fonseca
- ISCTE-Instituto Universitéario de Lisboa, Portugal
- GoLP/Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, Lisbon, Portugal
| | | | - I Furno
- Ecole Polytechnique Federale de Lausanne (EPFL), Swiss Plasma Center (SPC), Lausanne, Switzerland
| | | | - S Gessner
- CERN, Geneva, Switzerland
- SLAC National Accelerator Laboratory, Menlo Park, California, USA
| | | | - A A Gorn
- Novosibirsk State University, Novosibirsk, Russia
- Budker Institute of Nuclear Physics SB RAS, Novosibirsk, Russia
| | | | - M Granetzny
- University of Wisconsin, Madison, Wisconsin, USA
| | - T Graubner
- Philipps-Universität Marburg, Marburg, Germany
| | - O Grulke
- Max Planck Institute for Plasma Physics, Greifswald, Germany
- Technical University of Denmark, Lyngby, Denmark
| | | | - V Hafych
- Max Planck Institute for Physics, Munich, Germany
| | - A Helm
- GoLP/Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, Lisbon, Portugal
| | - J R Henderson
- Cockcroft Institute, Daresbury, United Kingdom
- Accelerator Science and Technology Centre, ASTeC, STFC Daresbury Laboratory, Warrington, United Kingdom
| | - M Hüther
- Max Planck Institute for Physics, Munich, Germany
| | - I Yu Kargapolov
- Novosibirsk State University, Novosibirsk, Russia
- Budker Institute of Nuclear Physics SB RAS, Novosibirsk, Russia
| | - S-Y Kim
- Ulsan National Institute of Science and Technology, Ulsan, Republic of Korea
| | - F Kraus
- Philipps-Universität Marburg, Marburg, Germany
| | | | | | - L Liang
- Cockcroft Institute, Daresbury, United Kingdom
- University of Manchester, Manchester, United Kingdom
| | - S Liu
- TRIUMF, Vancouver, Canada
| | - N Lopes
- GoLP/Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, Lisbon, Portugal
| | - K V Lotov
- Novosibirsk State University, Novosibirsk, Russia
- Budker Institute of Nuclear Physics SB RAS, Novosibirsk, Russia
| | - M Martyanov
- Max Planck Institute for Physics, Munich, Germany
| | | | | | - V A Minakov
- Novosibirsk State University, Novosibirsk, Russia
- Budker Institute of Nuclear Physics SB RAS, Novosibirsk, Russia
| | - J T Moody
- Max Planck Institute for Physics, Munich, Germany
| | - K Moon
- Ulsan National Institute of Science and Technology, Ulsan, Republic of Korea
| | | | - M Moreira
- CERN, Geneva, Switzerland
- GoLP/Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, Lisbon, Portugal
| | - T Nechaeva
- Max Planck Institute for Physics, Munich, Germany
| | | | - C Pakuza
- John Adams Institute, Oxford University, Oxford, United Kingdom
| | | | | | - A Perera
- Cockcroft Institute, Daresbury, United Kingdom
- University of Liverpool, Liverpool, United Kingdom
| | - J Pucek
- Max Planck Institute for Physics, Munich, Germany
| | - A Pukhov
- Heinrich-Heine-Universität Düsseldorf, Düsseldorf, Germany
| | - R L Ramjiawan
- CERN, Geneva, Switzerland
- John Adams Institute, Oxford University, Oxford, United Kingdom
| | - S Rey
- CERN, Geneva, Switzerland
| | - K Rieger
- Max Planck Institute for Physics, Munich, Germany
| | - O Schmitz
- University of Wisconsin, Madison, Wisconsin, USA
| | - E Senes
- CERN, Geneva, Switzerland
- John Adams Institute, Oxford University, Oxford, United Kingdom
| | - L O Silva
- GoLP/Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, Lisbon, Portugal
| | | | - R I Spitsyn
- Novosibirsk State University, Novosibirsk, Russia
- Budker Institute of Nuclear Physics SB RAS, Novosibirsk, Russia
| | - C Stollberg
- Ecole Polytechnique Federale de Lausanne (EPFL), Swiss Plasma Center (SPC), Lausanne, Switzerland
| | | | | | - N Torrado
- GoLP/Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, Lisbon, Portugal
| | - P V Tuev
- Novosibirsk State University, Novosibirsk, Russia
- Budker Institute of Nuclear Physics SB RAS, Novosibirsk, Russia
| | - M Turner
- CERN, Geneva, Switzerland
- Lawrence Berkeley National Laboratory, Berkeley, California, USA
| | | | - L Verra
- Max Planck Institute for Physics, Munich, Germany
- CERN, Geneva, Switzerland
- Technical University Munich, Munich, Germany
| | | | - J Vieira
- GoLP/Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, Lisbon, Portugal
| | | | - C P Welsch
- Cockcroft Institute, Daresbury, United Kingdom
- University of Liverpool, Liverpool, United Kingdom
| | | | - M Wing
- University College London, London, United Kingdom
| | | | - J Wolfenden
- Cockcroft Institute, Daresbury, United Kingdom
- University of Liverpool, Liverpool, United Kingdom
| | | | - G Xia
- Cockcroft Institute, Daresbury, United Kingdom
- University of Manchester, Manchester, United Kingdom
| | - M Zepp
- University of Wisconsin, Madison, Wisconsin, USA
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6
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Braunmüller F, Nechaeva T, Adli E, Agnello R, Aladi M, Andrebe Y, Apsimon O, Apsimon R, Bachmann AM, Baistrukov MA, Batsch F, Bergamaschi M, Blanchard P, Burrows PN, Buttenschön B, Caldwell A, Chappell J, Chevallay E, Chung M, Cooke DA, Damerau H, Davut C, Demeter G, Deubner LH, Dexter A, Djotyan GP, Doebert S, Farmer J, Fasoli A, Fedosseev VN, Fiorito R, Fonseca RA, Friebel F, Furno I, Garolfi L, Gessner S, Goddard B, Gorgisyan I, Gorn AA, Granados E, Granetzny M, Grulke O, Gschwendtner E, Hafych V, Hartin A, Helm A, Henderson JR, Howling A, Hüther M, Jacquier R, Jolly S, Kargapolov IY, Kedves MÁ, Keeble F, Kelisani MD, Kim SY, Kraus F, Krupa M, Lefevre T, Li Y, Liang L, Liu S, Lopes N, Lotov KV, Martyanov M, Mazzoni S, Medina Godoy D, Minakov VA, Moody JT, Morales Guzmán PI, Moreira M, Muggli P, Panuganti H, Pardons A, Peña Asmus F, Perera A, Petrenko A, Pucek J, Pukhov A, Ráczkevi B, Ramjiawan RL, Rey S, Ruhl H, Saberi H, Schmitz O, Senes E, Sherwood P, Silva LO, Spitsyn RI, Tuev PV, Turner M, Velotti F, Verra L, Verzilov VA, Vieira J, Welsch CP, Williamson B, Wing M, Wolfenden J, Woolley B, Xia G, Zepp M, Zevi Della Porta G. Proton Bunch Self-Modulation in Plasma with Density Gradient. Phys Rev Lett 2020; 125:264801. [PMID: 33449727 DOI: 10.1103/physrevlett.125.264801] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2020] [Revised: 11/10/2020] [Accepted: 11/10/2020] [Indexed: 06/12/2023]
Abstract
We study experimentally the effect of linear plasma density gradients on the self-modulation of a 400 GeV proton bunch. Results show that a positive or negative gradient increases or decreases the number of microbunches and the relative charge per microbunch observed after 10 m of plasma. The measured modulation frequency also increases or decreases. With the largest positive gradient we observe two frequencies in the modulation power spectrum. Results are consistent with changes in wakefields' phase velocity due to plasma density gradients adding to the slow wakefields' phase velocity during self-modulation growth predicted by linear theory.
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Affiliation(s)
| | - T Nechaeva
- Belarusian State University, Minsk, Belarus
| | - E Adli
- University of Oslo, Oslo, Norway
| | - R Agnello
- Ecole Polytechnique Federale de Lausanne (EPFL), Swiss Plasma Center (SPC), Lausanne, Switzerland
| | - M Aladi
- Wigner Research Center for Physics, Budapest, Hungary
| | - Y Andrebe
- Ecole Polytechnique Federale de Lausanne (EPFL), Swiss Plasma Center (SPC), Lausanne, Switzerland
| | - O Apsimon
- Cockcroft Institute, Daresbury, United Kingdom
- Lancaster University, Lancaster, United Kingdom
| | - R Apsimon
- Cockcroft Institute, Daresbury, United Kingdom
- Lancaster University, Lancaster, United Kingdom
| | - A-M Bachmann
- Max Planck Institute for Physics, Munich, Germany
- CERN, Geneva, Switzerland
- Technical University Munich, Munich, Germany
| | - M A Baistrukov
- Budker Institute of Nuclear Physics SB RAS, Novosibirsk, Russia
- Novosibirsk State University, Novosibirsk, Russia
| | - F Batsch
- Max Planck Institute for Physics, Munich, Germany
- CERN, Geneva, Switzerland
- Technical University Munich, Munich, Germany
| | | | - P Blanchard
- Ecole Polytechnique Federale de Lausanne (EPFL), Swiss Plasma Center (SPC), Lausanne, Switzerland
| | - P N Burrows
- John Adams Institute, Oxford University, Oxford, United Kingdom
| | - B Buttenschön
- Max Planck Institute for Plasma Physics, Greifswald, Germany
| | - A Caldwell
- Max Planck Institute for Physics, Munich, Germany
| | | | | | - M Chung
- UNIST, Ulsan, Republic of Korea
| | | | | | - C Davut
- Cockcroft Institute, Daresbury, United Kingdom
- University of Manchester, Manchester, United Kingdom
| | - G Demeter
- Wigner Research Center for Physics, Budapest, Hungary
| | - L H Deubner
- Philipps-Universität Marburg, Marburg, Germany
| | - A Dexter
- Cockcroft Institute, Daresbury, United Kingdom
- Lancaster University, Lancaster, United Kingdom
| | - G P Djotyan
- Wigner Research Center for Physics, Budapest, Hungary
| | | | - J Farmer
- Max Planck Institute for Physics, Munich, Germany
- CERN, Geneva, Switzerland
| | - A Fasoli
- Ecole Polytechnique Federale de Lausanne (EPFL), Swiss Plasma Center (SPC), Lausanne, Switzerland
| | | | - R Fiorito
- Cockcroft Institute, Daresbury, United Kingdom
- University of Liverpool, Liverpool, United Kingdom
| | - R A Fonseca
- ISCTE-Instituto Universitéario de Lisboa, Lisbon, Portugal
- GoLP/Instituto de Plasmas e Fusáo Nuclear, Instituto Superior Técnico, Universidade de Lisboa, Lisbon, Portugal
| | | | - I Furno
- Ecole Polytechnique Federale de Lausanne (EPFL), Swiss Plasma Center (SPC), Lausanne, Switzerland
| | | | - S Gessner
- CERN, Geneva, Switzerland
- SLAC National Accelerator Laboratory, Menlo Park, California, USA
| | | | | | - A A Gorn
- Budker Institute of Nuclear Physics SB RAS, Novosibirsk, Russia
- Novosibirsk State University, Novosibirsk, Russia
| | | | - M Granetzny
- University of Wisconsin, Madison, Wisconsin, USA
| | - O Grulke
- Max Planck Institute for Plasma Physics, Greifswald, Germany
- Technical University of Denmark, Lyngby, Denmark
| | | | - V Hafych
- Max Planck Institute for Physics, Munich, Germany
| | | | - A Helm
- GoLP/Instituto de Plasmas e Fusáo Nuclear, Instituto Superior Técnico, Universidade de Lisboa, Lisbon, Portugal
| | - J R Henderson
- Cockcroft Institute, Daresbury, United Kingdom
- Accelerator Science and Technology Centre, ASTeC, STFC Daresbury Laboratory, Warrington, United Kingdom
| | - A Howling
- Ecole Polytechnique Federale de Lausanne (EPFL), Swiss Plasma Center (SPC), Lausanne, Switzerland
| | - M Hüther
- Max Planck Institute for Physics, Munich, Germany
| | - R Jacquier
- Ecole Polytechnique Federale de Lausanne (EPFL), Swiss Plasma Center (SPC), Lausanne, Switzerland
| | | | - I Yu Kargapolov
- Budker Institute of Nuclear Physics SB RAS, Novosibirsk, Russia
- Novosibirsk State University, Novosibirsk, Russia
| | - M Á Kedves
- Wigner Research Center for Physics, Budapest, Hungary
| | | | | | - S-Y Kim
- UNIST, Ulsan, Republic of Korea
| | - F Kraus
- Philipps-Universität Marburg, Marburg, Germany
| | | | | | - Y Li
- Cockcroft Institute, Daresbury, United Kingdom
- University of Manchester, Manchester, United Kingdom
| | - L Liang
- Cockcroft Institute, Daresbury, United Kingdom
- University of Manchester, Manchester, United Kingdom
| | - S Liu
- TRIUMF, Vancouver, Canada
| | - N Lopes
- GoLP/Instituto de Plasmas e Fusáo Nuclear, Instituto Superior Técnico, Universidade de Lisboa, Lisbon, Portugal
| | - K V Lotov
- Budker Institute of Nuclear Physics SB RAS, Novosibirsk, Russia
- Novosibirsk State University, Novosibirsk, Russia
| | - M Martyanov
- Max Planck Institute for Physics, Munich, Germany
| | | | | | - V A Minakov
- Budker Institute of Nuclear Physics SB RAS, Novosibirsk, Russia
- Novosibirsk State University, Novosibirsk, Russia
| | - J T Moody
- Max Planck Institute for Physics, Munich, Germany
| | | | - M Moreira
- CERN, Geneva, Switzerland
- GoLP/Instituto de Plasmas e Fusáo Nuclear, Instituto Superior Técnico, Universidade de Lisboa, Lisbon, Portugal
| | - P Muggli
- Max Planck Institute for Physics, Munich, Germany
| | | | | | - F Peña Asmus
- Max Planck Institute for Physics, Munich, Germany
- Technical University Munich, Munich, Germany
| | - A Perera
- Cockcroft Institute, Daresbury, United Kingdom
- University of Liverpool, Liverpool, United Kingdom
| | - A Petrenko
- Budker Institute of Nuclear Physics SB RAS, Novosibirsk, Russia
| | - J Pucek
- Max Planck Institute for Physics, Munich, Germany
| | - A Pukhov
- Heinrich-Heine-Universität Düsseldorf, Düsseldorf, Germany
| | - B Ráczkevi
- Wigner Research Center for Physics, Budapest, Hungary
| | - R L Ramjiawan
- CERN, Geneva, Switzerland
- John Adams Institute, Oxford University, Oxford, United Kingdom
| | - S Rey
- CERN, Geneva, Switzerland
| | - H Ruhl
- Ludwig-Maximilians-Universität, Munich, Germany
| | | | - O Schmitz
- University of Wisconsin, Madison, Wisconsin, USA
| | - E Senes
- CERN, Geneva, Switzerland
- John Adams Institute, Oxford University, Oxford, United Kingdom
| | | | - L O Silva
- GoLP/Instituto de Plasmas e Fusáo Nuclear, Instituto Superior Técnico, Universidade de Lisboa, Lisbon, Portugal
| | - R I Spitsyn
- Budker Institute of Nuclear Physics SB RAS, Novosibirsk, Russia
- Novosibirsk State University, Novosibirsk, Russia
| | - P V Tuev
- Budker Institute of Nuclear Physics SB RAS, Novosibirsk, Russia
- Novosibirsk State University, Novosibirsk, Russia
| | | | | | - L Verra
- Max Planck Institute for Physics, Munich, Germany
- CERN, Geneva, Switzerland
- Technical University Munich, Munich, Germany
| | | | - J Vieira
- GoLP/Instituto de Plasmas e Fusáo Nuclear, Instituto Superior Técnico, Universidade de Lisboa, Lisbon, Portugal
| | - C P Welsch
- Cockcroft Institute, Daresbury, United Kingdom
- University of Liverpool, Liverpool, United Kingdom
| | - B Williamson
- Cockcroft Institute, Daresbury, United Kingdom
- University of Manchester, Manchester, United Kingdom
| | - M Wing
- UCL, London, United Kingdom
| | - J Wolfenden
- Cockcroft Institute, Daresbury, United Kingdom
- University of Liverpool, Liverpool, United Kingdom
| | | | - G Xia
- Cockcroft Institute, Daresbury, United Kingdom
- University of Manchester, Manchester, United Kingdom
| | - M Zepp
- University of Wisconsin, Madison, Wisconsin, USA
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7
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Wegner T, Geiger B, Foest R, Jansen van Vuuren A, Winters VR, Biedermann C, Burhenn R, Buttenschön B, Cseh G, Joda I, Kocsis G, Kunkel F, Quade A, Schäfer J, Schmitz O, Szepesi T. Preparation, analysis, and application of coated glass targets for the Wendelstein 7-X laser blow-off system. Rev Sci Instrum 2020; 91:083503. [PMID: 32872937 DOI: 10.1063/1.5144943] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/13/2020] [Accepted: 07/09/2020] [Indexed: 06/11/2023]
Abstract
Coated glass targets are a key component of the Wendelstein 7-X laser blow-off system that is used for impurity transport studies. The preparation and analysis of these glass targets as well as their performance is examined in this paper. The glass targets have a high laser damage threshold and are coated via physical vapor deposition with µm thick films. In addition, nm-thin layers of Ti are used as an interface layer for improved ablation efficiency and reduced coating stress. Hence, the metallic or ceramic coating has a lateral homogeneity within 2% and contaminants less than 5%, being optimal for laser ablation processing. With this method, a short (few ms) and well defined pulse of impurities with about 1017 particles can be injected close to the last closed flux surface of Wendelstein 7-X. In particular, a significant amount of atoms with a velocity of about 1 km/s enters the plasma within 1 ms. The atoms are followed by a negligible concentration of slower clusters and macro-particles. This qualifies the use of the targets and applied laser settings for impurity transport studies with the laser blow-off system in Wendelstein 7-X.
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Affiliation(s)
- Th Wegner
- Max-Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - B Geiger
- Max-Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - R Foest
- Leibniz Institut für Plasmaforschung und Technologie e.V., 17489 Greifswald, Germany
| | | | - V R Winters
- Max-Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - C Biedermann
- Max-Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - R Burhenn
- Max-Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - B Buttenschön
- Max-Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - G Cseh
- Wigner Research Center for Physics, 1121 Budapest, Hungary
| | - I Joda
- University of Wisconsin-Madison, Madison, Wisconsin 53706, USA
| | - G Kocsis
- Wigner Research Center for Physics, 1121 Budapest, Hungary
| | - F Kunkel
- Max-Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - A Quade
- Leibniz Institut für Plasmaforschung und Technologie e.V., 17489 Greifswald, Germany
| | - J Schäfer
- Leibniz Institut für Plasmaforschung und Technologie e.V., 17489 Greifswald, Germany
| | - O Schmitz
- University of Wisconsin-Madison, Madison, Wisconsin 53706, USA
| | - T Szepesi
- Wigner Research Center for Physics, 1121 Budapest, Hungary
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8
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Gschwendtner E, Turner M, Adli E, Ahuja A, Apsimon O, Apsimon R, Bachmann AM, Batsch F, Bracco C, Braunmüller F, Burger S, Burt G, Buttenschön B, Caldwell A, Chappell J, Chevallay E, Chung M, Cooke D, Damerau H, Deubner LH, Dexter A, Doebert S, Farmer J, Fedosseev VN, Fiorito R, Fonseca RA, Friebel F, Garolfi L, Gessner S, Goddard B, Gorgisyan I, Gorn AA, Granados E, Grulke O, Hartin A, Helm A, Henderson JR, Hüther M, Ibison M, Jolly S, Keeble F, Kelisani MD, Kim SY, Kraus F, Krupa M, Lefevre T, Li Y, Liu S, Lopes N, Lotov KV, Martyanov M, Mazzoni S, Minakov VA, Molendijk JC, Moody JT, Moreira M, Muggli P, Panuganti H, Pardons A, Peña Asmus F, Perera A, Petrenko A, Pukhov A, Rey S, Sherwood P, Silva LO, Sosedkin AP, Tuev PV, Velotti F, Verra L, Verzilov VA, Vieira J, Welsch CP, Wendt M, Williamson B, Wing M, Woolley B, Xia G. Correction to 'Proton-driven plasma wakefield acceleration in AWAKE'. Philos Trans A Math Phys Eng Sci 2020; 378:20190539. [PMID: 31865874 PMCID: PMC6939239 DOI: 10.1098/rsta.2019.0539] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
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9
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Gschwendtner E, Turner M, Adli E, Ahuja A, Apsimon O, Apsimon R, Bachmann AM, Batsch F, Bracco C, Braunmüller F, Burger S, Burt G, Buttenschön B, Caldwell A, Chappell J, Chevallay E, Chung M, Cooke D, Damerau H, Deubner LH, Dexter A, Doebert S, Farmer J, Fedosseev VN, Fiorito R, Fonseca RA, Friebel F, Garolfi L, Gessner S, Goddard B, Gorgisyan I, Gorn AA, Granados E, Grulke O, Hartin A, Helm A, Henderson JR, Hüther M, Ibison M, Jolly S, Keeble F, Kelisani MD, Kim SY, Kraus F, Krupa M, Lefevre T, Li Y, Liu S, Lopes N, Lotov KV, Martyanov M, Mazzoni S, Minakov VA, Molendijk JC, Moody JT, Moreira M, Muggli P, Panuganti H, Pardons A, Peña Asmus F, Perera A, Petrenko A, Pukhov A, Rey S, Sherwood P, Silva LO, Sosedkin AP, Tuev PV, Velotti F, Verra L, Verzilov VA, Vieira J, Welsch CP, Wendt M, Williamson B, Wing M, Woolley B, Xia G. Proton-driven plasma wakefield acceleration in AWAKE. Philos Trans A Math Phys Eng Sci 2019; 377:20180418. [PMID: 31230571 PMCID: PMC6602911 DOI: 10.1098/rsta.2018.0418] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 04/25/2019] [Indexed: 06/09/2023]
Abstract
In this article, we briefly summarize the experiments performed during the first run of the Advanced Wakefield Experiment, AWAKE, at CERN (European Organization for Nuclear Research). The final goal of AWAKE Run 1 (2013-2018) was to demonstrate that 10-20 MeV electrons can be accelerated to GeV energies in a plasma wakefield driven by a highly relativistic self-modulated proton bunch. We describe the experiment, outline the measurement concept and present first results. Last, we outline our plans for the future. This article is part of the Theo Murphy meeting issue 'Directions in particle beam-driven plasma wakefield acceleration'.
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Affiliation(s)
| | | | - E. Adli
- University of Oslo, Oslo, Norway
| | | | - O. Apsimon
- University of Manchester, Manchester, UK
- Cockcroft Institute, Daresbury, UK
| | - R. Apsimon
- University of Manchester, Manchester, UK
- Cockcroft Institute, Daresbury, UK
| | - A.-M. Bachmann
- CERN, Geneva, Switzerland
- Max Planck Institute for Physics, Munich, Germany
- Technical University Munich, Munich, Germany
| | - F. Batsch
- CERN, Geneva, Switzerland
- Max Planck Institute for Physics, Munich, Germany
- Technical University Munich, Munich, Germany
| | | | | | | | - G. Burt
- Cockcroft Institute, Daresbury, UK
- Lancaster University, Lancaster, UK
| | - B. Buttenschön
- Max Planck Institute for Plasma Physics, Greifswald, Germany
| | - A. Caldwell
- Max Planck Institute for Physics, Munich, Germany
| | | | | | | | | | | | | | - A. Dexter
- Cockcroft Institute, Daresbury, UK
- Lancaster University, Lancaster, UK
| | | | - J. Farmer
- Heinrich-Heine-University of Düsseldorf, Düsseldorf, Germany
| | | | - R. Fiorito
- Cockcroft Institute, Daresbury, UK
- University of Liverpool, Liverpool, UK
| | - R. A. Fonseca
- ISCTE - Instituto Universitéario de Lisboa, Portugal
| | | | | | | | | | | | - A. A. Gorn
- Budker Institute of Nuclear Physics SB RAS, Novosibirsk, Russia
- Novosibirsk State University, Novosibirsk, Russia
| | | | - O. Grulke
- Max Planck Institute for Plasma Physics, Greifswald, Germany
- Technical University of Denmark, Lyngby, Denmark
| | | | - A. Helm
- GoLP/Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, Lisbon, Portugal
| | - J. R. Henderson
- Cockcroft Institute, Daresbury, UK
- Lancaster University, Lancaster, UK
| | - M. Hüther
- Max Planck Institute for Physics, Munich, Germany
| | - M. Ibison
- Cockcroft Institute, Daresbury, UK
- University of Liverpool, Liverpool, UK
| | | | | | | | | | - F. Kraus
- Philipps-Universität Marburg, Marburg, Germany
| | | | | | - Y. Li
- University of Manchester, Manchester, UK
- Cockcroft Institute, Daresbury, UK
| | - S. Liu
- TRIUMF, Vancouver, Canada
| | - N. Lopes
- GoLP/Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, Lisbon, Portugal
| | - K. V. Lotov
- Budker Institute of Nuclear Physics SB RAS, Novosibirsk, Russia
- Novosibirsk State University, Novosibirsk, Russia
| | - M. Martyanov
- Max Planck Institute for Physics, Munich, Germany
| | | | - V. A. Minakov
- Budker Institute of Nuclear Physics SB RAS, Novosibirsk, Russia
- Novosibirsk State University, Novosibirsk, Russia
| | | | - J. T. Moody
- Max Planck Institute for Physics, Munich, Germany
| | - M. Moreira
- CERN, Geneva, Switzerland
- GoLP/Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, Lisbon, Portugal
| | - P. Muggli
- CERN, Geneva, Switzerland
- Max Planck Institute for Physics, Munich, Germany
| | | | | | - F. Peña Asmus
- Max Planck Institute for Physics, Munich, Germany
- Technical University Munich, Munich, Germany
| | - A. Perera
- Cockcroft Institute, Daresbury, UK
- University of Liverpool, Liverpool, UK
| | - A. Petrenko
- CERN, Geneva, Switzerland
- Budker Institute of Nuclear Physics SB RAS, Novosibirsk, Russia
| | - A. Pukhov
- Heinrich-Heine-University of Düsseldorf, Düsseldorf, Germany
| | - S. Rey
- CERN, Geneva, Switzerland
| | | | - L. O. Silva
- GoLP/Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, Lisbon, Portugal
| | - A. P. Sosedkin
- Budker Institute of Nuclear Physics SB RAS, Novosibirsk, Russia
- Novosibirsk State University, Novosibirsk, Russia
| | - P. V. Tuev
- Budker Institute of Nuclear Physics SB RAS, Novosibirsk, Russia
- Novosibirsk State University, Novosibirsk, Russia
| | | | - L. Verra
- CERN, Geneva, Switzerland
- University of Milan, Milan, Italy
| | | | - J. Vieira
- GoLP/Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, Lisbon, Portugal
| | - C. P. Welsch
- Cockcroft Institute, Daresbury, UK
- University of Liverpool, Liverpool, UK
| | | | - B. Williamson
- University of Manchester, Manchester, UK
- Cockcroft Institute, Daresbury, UK
| | | | | | - G. Xia
- University of Manchester, Manchester, UK
- Cockcroft Institute, Daresbury, UK
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10
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Zhang D, König R, Feng Y, Burhenn R, Brezinsek S, Jakubowski M, Buttenschön B, Niemann H, Pavone A, Krychowiak M, Kwak S, Svensson J, Gao Y, Pedersen TS, Alonso A, Baldzuhn J, Beidler CD, Biedermann C, Bozhenkov S, Brunner KJ, Damm H, Hirsch M, Giannone L, Drewelow P, Effenberg F, Fuchert G, Hammond KC, Höfel U, Killer C, Knauer J, Laqua HP, Laube R, Pablant N, Pasch E, Penzel F, Rahbarnia K, Reimold F, Thomsen H, Winters V, Wagner F, Klinger T. First Observation of a Stable Highly Dissipative Divertor Plasma Regime on the Wendelstein 7-X Stellarator. Phys Rev Lett 2019; 123:025002. [PMID: 31386539 DOI: 10.1103/physrevlett.123.025002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/17/2019] [Indexed: 06/10/2023]
Abstract
For the first time, the optimized stellarator Wendelstein 7-X has operated with an island divertor. An operation regime in hydrogen was found in which the total plasma radiation approached the absorbed heating power without noticeable loss of stored energy. The divertor thermography recorded simultaneously a strong reduction of the heat load on all divertor targets, indicating almost complete power detachment. This operation regime was stably sustained over several energy confinement times until the preprogrammed end of the discharge. The plasma radiation is mainly due to oxygen and is located at the plasma edge. This plasma scenario is reproducible and robust at various heating powers, plasma densities, and gas fueling locations. These experimental results show that the island divertor concept actually works and displays good power dissipation potential, producing a promising exhaust concept for the stellarator reactor line.
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Affiliation(s)
- D Zhang
- Max-Planck-Institut für Plasmaphysik, 17491 Greifswald, Germany
| | - R König
- Max-Planck-Institut für Plasmaphysik, 17491 Greifswald, Germany
| | - Y Feng
- Max-Planck-Institut für Plasmaphysik, 17491 Greifswald, Germany
| | - R Burhenn
- Max-Planck-Institut für Plasmaphysik, 17491 Greifswald, Germany
| | - S Brezinsek
- Forschungszentrum Jülich GmbH, IEK-4 52425 Jülich, Germany
| | - M Jakubowski
- Max-Planck-Institut für Plasmaphysik, 17491 Greifswald, Germany
| | - B Buttenschön
- Max-Planck-Institut für Plasmaphysik, 17491 Greifswald, Germany
| | - H Niemann
- Max-Planck-Institut für Plasmaphysik, 17491 Greifswald, Germany
| | - A Pavone
- Max-Planck-Institut für Plasmaphysik, 17491 Greifswald, Germany
| | - M Krychowiak
- Max-Planck-Institut für Plasmaphysik, 17491 Greifswald, Germany
| | - S Kwak
- Max-Planck-Institut für Plasmaphysik, 17491 Greifswald, Germany
| | - J Svensson
- Max-Planck-Institut für Plasmaphysik, 17491 Greifswald, Germany
| | - Y Gao
- Forschungszentrum Jülich GmbH, IEK-4 52425 Jülich, Germany
| | - T S Pedersen
- Max-Planck-Institut für Plasmaphysik, 17491 Greifswald, Germany
| | - A Alonso
- Laboratorio Nacional de Fusion CIEMAT, 28040 Madrid, Spain
| | - J Baldzuhn
- Max-Planck-Institut für Plasmaphysik, 17491 Greifswald, Germany
| | - C D Beidler
- Max-Planck-Institut für Plasmaphysik, 17491 Greifswald, Germany
| | - C Biedermann
- Max-Planck-Institut für Plasmaphysik, 17491 Greifswald, Germany
| | - S Bozhenkov
- Max-Planck-Institut für Plasmaphysik, 17491 Greifswald, Germany
| | - K J Brunner
- Max-Planck-Institut für Plasmaphysik, 17491 Greifswald, Germany
| | - H Damm
- Max-Planck-Institut für Plasmaphysik, 17491 Greifswald, Germany
| | - M Hirsch
- Max-Planck-Institut für Plasmaphysik, 17491 Greifswald, Germany
| | - L Giannone
- Max-Planck-Institut für Plasmaphysik, 85748 Garching, Germany
| | - P Drewelow
- Max-Planck-Institut für Plasmaphysik, 17491 Greifswald, Germany
| | - F Effenberg
- University of Wisconsin, Madison, Wisconsin 53706, USA
| | - G Fuchert
- Max-Planck-Institut für Plasmaphysik, 17491 Greifswald, Germany
| | - K C Hammond
- Max-Planck-Institut für Plasmaphysik, 17491 Greifswald, Germany
| | - U Höfel
- Max-Planck-Institut für Plasmaphysik, 17491 Greifswald, Germany
| | - C Killer
- Max-Planck-Institut für Plasmaphysik, 17491 Greifswald, Germany
| | - J Knauer
- Max-Planck-Institut für Plasmaphysik, 17491 Greifswald, Germany
| | - H P Laqua
- Max-Planck-Institut für Plasmaphysik, 17491 Greifswald, Germany
| | - R Laube
- Max-Planck-Institut für Plasmaphysik, 17491 Greifswald, Germany
| | - N Pablant
- Princeton Plasma Physics Laboratory, Princeton, New Jersey 08540, USA
| | - E Pasch
- Max-Planck-Institut für Plasmaphysik, 17491 Greifswald, Germany
| | - F Penzel
- Max-Planck-Institut für Plasmaphysik, 85748 Garching, Germany
| | - K Rahbarnia
- Max-Planck-Institut für Plasmaphysik, 17491 Greifswald, Germany
| | - F Reimold
- Max-Planck-Institut für Plasmaphysik, 17491 Greifswald, Germany
| | - H Thomsen
- Max-Planck-Institut für Plasmaphysik, 17491 Greifswald, Germany
| | - V Winters
- University of Wisconsin, Madison, Wisconsin 53706, USA
| | - F Wagner
- Max-Planck-Institut für Plasmaphysik, 17491 Greifswald, Germany
| | - T Klinger
- Max-Planck-Institut für Plasmaphysik, 17491 Greifswald, Germany
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11
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Adli E, Ahuja A, Apsimon O, Apsimon R, Bachmann AM, Barrientos D, Barros MM, Batkiewicz J, Batsch F, Bauche J, Berglyd Olsen VK, Bernardini M, Biskup B, Boccardi A, Bogey T, Bohl T, Bracco C, Braunmüller F, Burger S, Burt G, Bustamante S, Buttenschön B, Caldwell A, Cascella M, Chappell J, Chevallay E, Chung M, Cooke D, Damerau H, Deacon L, Deubner LH, Dexter A, Doebert S, Farmer J, Fedosseev VN, Fior G, Fiorito R, Fonseca RA, Friebel F, Garolfi L, Gessner S, Gorgisyan I, Gorn AA, Granados E, Grulke O, Gschwendtner E, Guerrero A, Hansen J, Helm A, Henderson JR, Hessler C, Hofle W, Hüther M, Ibison M, Jensen L, Jolly S, Keeble F, Kim SY, Kraus F, Lefevre T, LeGodec G, Li Y, Liu S, Lopes N, Lotov KV, Maricalva Brun L, Martyanov M, Mazzoni S, Medina Godoy D, Minakov VA, Mitchell J, Molendijk JC, Mompo R, Moody JT, Moreira M, Muggli P, Mutin C, Öz E, Ozturk E, Pasquino C, Pardons A, Peña Asmus F, Pepitone K, Perera A, Petrenko A, Pitman S, Plyushchev G, Pukhov A, Rey S, Rieger K, Ruhl H, Schmidt JS, Shalimova IA, Shaposhnikova E, Sherwood P, Silva LO, Soby L, Sosedkin AP, Speroni R, Spitsyn RI, Tuev PV, Turner M, Velotti F, Verra L, Verzilov VA, Vieira J, Vincke H, Welsch CP, Williamson B, Wing M, Woolley B, Xia G. Experimental Observation of Proton Bunch Modulation in a Plasma at Varying Plasma Densities. Phys Rev Lett 2019; 122:054802. [PMID: 30822008 DOI: 10.1103/physrevlett.122.054802] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/05/2018] [Indexed: 06/09/2023]
Abstract
We give direct experimental evidence for the observation of the full transverse self-modulation of a long, relativistic proton bunch propagating through a dense plasma. The bunch exits the plasma with a periodic density modulation resulting from radial wakefield effects. We show that the modulation is seeded by a relativistic ionization front created using an intense laser pulse copropagating with the proton bunch. The modulation extends over the length of the proton bunch following the seed point. By varying the plasma density over one order of magnitude, we show that the modulation frequency scales with the expected dependence on the plasma density, i.e., it is equal to the plasma frequency, as expected from theory.
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Affiliation(s)
- E Adli
- University of Oslo, 0316 Oslo, Norway
| | - A Ahuja
- CERN, 1211 Geneva, Switzerland
| | - O Apsimon
- University of Manchester, M13 9PL Manchester, United Kingdom
- Cockcroft Institute, WA4 4AD Daresbury, United Kingdom
| | - R Apsimon
- Cockcroft Institute, WA4 4AD Daresbury, United Kingdom
- Lancaster University, LA1 4YB Lancaster, United Kingdom
| | - A-M Bachmann
- CERN, 1211 Geneva, Switzerland
- Max Planck Institute for Physics, 80805 Munich, Germany
- Technical University Munich, 80333 Munich, Germany
| | | | | | | | - F Batsch
- CERN, 1211 Geneva, Switzerland
- Max Planck Institute for Physics, 80805 Munich, Germany
- Technical University Munich, 80333 Munich, Germany
| | | | | | | | | | | | - T Bogey
- CERN, 1211 Geneva, Switzerland
| | - T Bohl
- CERN, 1211 Geneva, Switzerland
| | | | - F Braunmüller
- Max Planck Institute for Physics, 80805 Munich, Germany
| | | | - G Burt
- Cockcroft Institute, WA4 4AD Daresbury, United Kingdom
- Lancaster University, LA1 4YB Lancaster, United Kingdom
| | | | - B Buttenschön
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - A Caldwell
- Max Planck Institute for Physics, 80805 Munich, Germany
| | | | | | | | - M Chung
- UNIST, 44919 Ulsan, Republic of Korea
| | - D Cooke
- UCL, WC1E 6BT London, United Kingdom
| | | | - L Deacon
- UCL, WC1E 6BT London, United Kingdom
| | - L H Deubner
- Philipps-Universität Marburg, 35032 Marburg, Germany
| | - A Dexter
- Cockcroft Institute, WA4 4AD Daresbury, United Kingdom
- Lancaster University, LA1 4YB Lancaster, United Kingdom
| | | | - J Farmer
- Heinrich-Heine-University of Düsseldorf, 40225 Düsseldorf, Germany
| | | | - G Fior
- Max Planck Institute for Physics, 80805 Munich, Germany
| | - R Fiorito
- Cockcroft Institute, WA4 4AD Daresbury, United Kingdom
- University of Liverpool, L69 7ZE Liverpool, United Kingdom
| | - R A Fonseca
- ISCTE-Instituto Universitéario de Lisboa, 1649-026 Lisbon, Portugal
| | | | | | | | | | - A A Gorn
- Budker Institute of Nuclear Physics SB RAS, 630090 Novosibirsk, Russia
- Novosibirsk State University, 630090 Novosibirsk, Russia
| | | | - O Grulke
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
- Technical University of Denmark, 2800 Lyngby, Denmark
| | | | | | | | - A Helm
- GoLP/Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisbon, Portugal
| | - J R Henderson
- Cockcroft Institute, WA4 4AD Daresbury, United Kingdom
- Lancaster University, LA1 4YB Lancaster, United Kingdom
| | | | - W Hofle
- CERN, 1211 Geneva, Switzerland
| | - M Hüther
- Max Planck Institute for Physics, 80805 Munich, Germany
| | - M Ibison
- Cockcroft Institute, WA4 4AD Daresbury, United Kingdom
- University of Liverpool, L69 7ZE Liverpool, United Kingdom
| | | | - S Jolly
- UCL, WC1E 6BT London, United Kingdom
| | - F Keeble
- UCL, WC1E 6BT London, United Kingdom
| | - S-Y Kim
- UNIST, 44919 Ulsan, Republic of Korea
| | - F Kraus
- Philipps-Universität Marburg, 35032 Marburg, Germany
| | | | | | - Y Li
- University of Manchester, M13 9PL Manchester, United Kingdom
- Cockcroft Institute, WA4 4AD Daresbury, United Kingdom
| | - S Liu
- TRIUMF, V6T 2A3 Vancouver, Canada
| | - N Lopes
- GoLP/Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisbon, Portugal
| | - K V Lotov
- Budker Institute of Nuclear Physics SB RAS, 630090 Novosibirsk, Russia
- Novosibirsk State University, 630090 Novosibirsk, Russia
| | | | - M Martyanov
- Max Planck Institute for Physics, 80805 Munich, Germany
| | | | | | - V A Minakov
- Budker Institute of Nuclear Physics SB RAS, 630090 Novosibirsk, Russia
- Novosibirsk State University, 630090 Novosibirsk, Russia
| | - J Mitchell
- Cockcroft Institute, WA4 4AD Daresbury, United Kingdom
- Lancaster University, LA1 4YB Lancaster, United Kingdom
| | | | - R Mompo
- CERN, 1211 Geneva, Switzerland
| | - J T Moody
- Max Planck Institute for Physics, 80805 Munich, Germany
| | - M Moreira
- CERN, 1211 Geneva, Switzerland
- GoLP/Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisbon, Portugal
| | - P Muggli
- CERN, 1211 Geneva, Switzerland
- Max Planck Institute for Physics, 80805 Munich, Germany
| | - C Mutin
- CERN, 1211 Geneva, Switzerland
| | - E Öz
- Max Planck Institute for Physics, 80805 Munich, Germany
| | | | | | | | - F Peña Asmus
- Max Planck Institute for Physics, 80805 Munich, Germany
- Technical University Munich, 80333 Munich, Germany
| | | | - A Perera
- Cockcroft Institute, WA4 4AD Daresbury, United Kingdom
- University of Liverpool, L69 7ZE Liverpool, United Kingdom
| | - A Petrenko
- CERN, 1211 Geneva, Switzerland
- Budker Institute of Nuclear Physics SB RAS, 630090 Novosibirsk, Russia
| | - S Pitman
- Cockcroft Institute, WA4 4AD Daresbury, United Kingdom
- Lancaster University, LA1 4YB Lancaster, United Kingdom
| | | | - A Pukhov
- Heinrich-Heine-University of Düsseldorf, 40225 Düsseldorf, Germany
| | - S Rey
- CERN, 1211 Geneva, Switzerland
| | - K Rieger
- Max Planck Institute for Physics, 80805 Munich, Germany
| | - H Ruhl
- Ludwig-Maximilians-Universität, 80539 Munich, Germany
| | | | - I A Shalimova
- Novosibirsk State University, 630090 Novosibirsk, Russia
- Institute of Computational Mathematics and Mathematical Geophysics SB RAS, 630090 Novosibirsk, Russia
| | | | | | - L O Silva
- GoLP/Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisbon, Portugal
| | - L Soby
- CERN, 1211 Geneva, Switzerland
| | - A P Sosedkin
- Budker Institute of Nuclear Physics SB RAS, 630090 Novosibirsk, Russia
- Novosibirsk State University, 630090 Novosibirsk, Russia
| | | | - R I Spitsyn
- Budker Institute of Nuclear Physics SB RAS, 630090 Novosibirsk, Russia
- Novosibirsk State University, 630090 Novosibirsk, Russia
| | - P V Tuev
- Budker Institute of Nuclear Physics SB RAS, 630090 Novosibirsk, Russia
- Novosibirsk State University, 630090 Novosibirsk, Russia
| | | | | | - L Verra
- CERN, 1211 Geneva, Switzerland
- University of Milan, 20122 Milan, Italy
| | | | - J Vieira
- GoLP/Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisbon, Portugal
| | | | - C P Welsch
- Cockcroft Institute, WA4 4AD Daresbury, United Kingdom
- University of Liverpool, L69 7ZE Liverpool, United Kingdom
| | - B Williamson
- University of Manchester, M13 9PL Manchester, United Kingdom
- Cockcroft Institute, WA4 4AD Daresbury, United Kingdom
| | - M Wing
- UCL, WC1E 6BT London, United Kingdom
| | | | - G Xia
- University of Manchester, M13 9PL Manchester, United Kingdom
- Cockcroft Institute, WA4 4AD Daresbury, United Kingdom
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12
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Turner M, Adli E, Ahuja A, Apsimon O, Apsimon R, Bachmann AM, Barros Marin M, Barrientos D, Batsch F, Batkiewicz J, Bauche J, Berglyd Olsen VK, Bernardini M, Biskup B, Boccardi A, Bogey T, Bohl T, Bracco C, Braunmüller F, Burger S, Burt G, Bustamante S, Buttenschön B, Caldwell A, Cascella M, Chappell J, Chevallay E, Chung M, Cooke D, Damerau H, Deacon L, Deubner LH, Dexter A, Doebert S, Farmer J, Fedosseev VN, Fior G, Fiorito R, Fonseca RA, Friebel F, Garolfi L, Gessner S, Gorgisyan I, Gorn AA, Granados E, Grulke O, Gschwendtner E, Guerrero A, Hansen J, Helm A, Henderson JR, Hessler C, Hofle W, Hüther M, Ibison M, Jensen L, Jolly S, Keeble F, Kim SY, Kraus F, Lefevre T, LeGodec G, Li Y, Liu S, Lopes N, Lotov KV, Maricalva Brun L, Martyanov M, Mazzoni S, Medina Godoy D, Minakov VA, Mitchell J, Molendijk JC, Mompo R, Moody JT, Moreira M, Muggli P, Öz E, Ozturk E, Mutin C, Pasquino C, Pardons A, Peña Asmus F, Pepitone K, Perera A, Petrenko A, Pitman S, Plyushchev G, Pukhov A, Rey S, Rieger K, Ruhl H, Schmidt JS, Shalimova IA, Shaposhnikova E, Sherwood P, Silva LO, Soby L, Sosedkin AP, Speroni R, Spitsyn RI, Tuev PV, Velotti F, Verra L, Verzilov VA, Vieira J, Vincke H, Welsch CP, Williamson B, Wing M, Woolley B, Xia G. Experimental Observation of Plasma Wakefield Growth Driven by the Seeded Self-Modulation of a Proton Bunch. Phys Rev Lett 2019; 122:054801. [PMID: 30822039 DOI: 10.1103/physrevlett.122.054801] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/04/2018] [Indexed: 06/09/2023]
Abstract
We measure the effects of transverse wakefields driven by a relativistic proton bunch in plasma with densities of 2.1×10^{14} and 7.7×10^{14} electrons/cm^{3}. We show that these wakefields periodically defocus the proton bunch itself, consistently with the development of the seeded self-modulation process. We show that the defocusing increases both along the bunch and along the plasma by using time resolved and time-integrated measurements of the proton bunch transverse distribution. We evaluate the transverse wakefield amplitudes and show that they exceed their seed value (<15 MV/m) and reach over 300 MV/m. All these results confirm the development of the seeded self-modulation process, a necessary condition for external injection of low energy and acceleration of electrons to multi-GeV energy levels.
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Affiliation(s)
| | - E Adli
- University of Oslo, 0316 Oslo, Norway
| | - A Ahuja
- CERN, 1211 Geneva, Switzerland
| | - O Apsimon
- University of Manchester, M13 9PL Manchester, United Kingdom
- Cockcroft Institute, WA4 4AD Daresbury, United Kingdom
| | - R Apsimon
- Cockcroft Institute, WA4 4AD Daresbury, United Kingdom
- Lancaster University, LA1 4YB Lancaster, United Kingdom
| | - A-M Bachmann
- CERN, 1211 Geneva, Switzerland
- Max Planck Institute for Physics, 80805 Munich, Germany
- Technical University Munich, 80333 Munich, Germany
| | | | | | - F Batsch
- CERN, 1211 Geneva, Switzerland
- Max Planck Institute for Physics, 80805 Munich, Germany
- Technical University Munich, 80333 Munich, Germany
| | | | | | | | | | | | | | - T Bogey
- CERN, 1211 Geneva, Switzerland
| | - T Bohl
- CERN, 1211 Geneva, Switzerland
| | | | - F Braunmüller
- Max Planck Institute for Physics, 80805 Munich, Germany
| | | | - G Burt
- Cockcroft Institute, WA4 4AD Daresbury, United Kingdom
- Lancaster University, LA1 4YB Lancaster, United Kingdom
| | | | - B Buttenschön
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - A Caldwell
- Max Planck Institute for Physics, 80805 Munich, Germany
| | | | | | | | - M Chung
- UNIST, 44919 Ulsan, Republic of Korea
| | - D Cooke
- UCL, WC1E 6BT London, United Kingdom
| | | | - L Deacon
- UCL, WC1E 6BT London, United Kingdom
| | - L H Deubner
- Philipps-Universität Marburg, 35032 Marburg, Germany
| | - A Dexter
- Cockcroft Institute, WA4 4AD Daresbury, United Kingdom
- Lancaster University, LA1 4YB Lancaster, United Kingdom
| | | | - J Farmer
- Heinrich-Heine-University of Düsseldorf, 40225 Düsseldorf, Germany
| | | | - G Fior
- Max Planck Institute for Physics, 80805 Munich, Germany
| | - R Fiorito
- Cockcroft Institute, WA4 4AD Daresbury, United Kingdom
- University of Liverpool, L69 7ZE Liverpool, United Kingdom
| | - R A Fonseca
- ISCTE-Instituto Universitéario de Lisboa, 1649-026 Lisbon, Portugal
| | | | | | | | | | - A A Gorn
- Budker Institute of Nuclear Physics SB RAS, 630090 Novosibirsk, Russia
- Novosibirsk State University, 630090 Novosibirsk, Russia
| | | | - O Grulke
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
- Technical University of Denmark, 2800 Lyngby, Denmark
| | | | | | | | - A Helm
- GoLP/Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisbon, Portugal
| | - J R Henderson
- Cockcroft Institute, WA4 4AD Daresbury, United Kingdom
- Lancaster University, LA1 4YB Lancaster, United Kingdom
| | | | - W Hofle
- CERN, 1211 Geneva, Switzerland
| | - M Hüther
- Max Planck Institute for Physics, 80805 Munich, Germany
| | - M Ibison
- Cockcroft Institute, WA4 4AD Daresbury, United Kingdom
- University of Liverpool, L69 7ZE Liverpool, United Kingdom
| | | | - S Jolly
- UCL, WC1E 6BT London, United Kingdom
| | - F Keeble
- UCL, WC1E 6BT London, United Kingdom
| | - S-Y Kim
- UNIST, 44919 Ulsan, Republic of Korea
| | - F Kraus
- Philipps-Universität Marburg, 35032 Marburg, Germany
| | | | | | - Y Li
- University of Manchester, M13 9PL Manchester, United Kingdom
- Cockcroft Institute, WA4 4AD Daresbury, United Kingdom
| | - S Liu
- TRIUMF, V6T 2A3 Vancouver, Canada
| | - N Lopes
- GoLP/Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisbon, Portugal
| | - K V Lotov
- Budker Institute of Nuclear Physics SB RAS, 630090 Novosibirsk, Russia
- Novosibirsk State University, 630090 Novosibirsk, Russia
| | | | - M Martyanov
- Max Planck Institute for Physics, 80805 Munich, Germany
| | | | | | - V A Minakov
- Budker Institute of Nuclear Physics SB RAS, 630090 Novosibirsk, Russia
- Novosibirsk State University, 630090 Novosibirsk, Russia
| | - J Mitchell
- Cockcroft Institute, WA4 4AD Daresbury, United Kingdom
- Lancaster University, LA1 4YB Lancaster, United Kingdom
| | | | - R Mompo
- CERN, 1211 Geneva, Switzerland
| | - J T Moody
- Max Planck Institute for Physics, 80805 Munich, Germany
| | - M Moreira
- CERN, 1211 Geneva, Switzerland
- GoLP/Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisbon, Portugal
| | - P Muggli
- CERN, 1211 Geneva, Switzerland
- Max Planck Institute for Physics, 80805 Munich, Germany
| | - E Öz
- Max Planck Institute for Physics, 80805 Munich, Germany
| | | | - C Mutin
- CERN, 1211 Geneva, Switzerland
| | | | | | - F Peña Asmus
- Max Planck Institute for Physics, 80805 Munich, Germany
- Technical University Munich, 80333 Munich, Germany
| | | | - A Perera
- Cockcroft Institute, WA4 4AD Daresbury, United Kingdom
- University of Liverpool, L69 7ZE Liverpool, United Kingdom
| | - A Petrenko
- CERN, 1211 Geneva, Switzerland
- Budker Institute of Nuclear Physics SB RAS, 630090 Novosibirsk, Russia
| | - S Pitman
- Cockcroft Institute, WA4 4AD Daresbury, United Kingdom
- Lancaster University, LA1 4YB Lancaster, United Kingdom
| | - G Plyushchev
- CERN, 1211 Geneva, Switzerland
- Swiss Plasma Center, EPFL, 1015 Lausanne, Switzerland
| | - A Pukhov
- Heinrich-Heine-University of Düsseldorf, 40225 Düsseldorf, Germany
| | - S Rey
- CERN, 1211 Geneva, Switzerland
| | - K Rieger
- Max Planck Institute for Physics, 80805 Munich, Germany
| | - H Ruhl
- Ludwig-Maximilians-Universität, 80539 Munich, Germany
| | | | - I A Shalimova
- Novosibirsk State University, 630090 Novosibirsk, Russia
- Institute of Computational Mathematics and Mathematical Geophysics SB RAS, 630090 Novosibirsk, Russia
| | | | | | - L O Silva
- GoLP/Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisbon, Portugal
| | - L Soby
- CERN, 1211 Geneva, Switzerland
| | - A P Sosedkin
- Budker Institute of Nuclear Physics SB RAS, 630090 Novosibirsk, Russia
- Novosibirsk State University, 630090 Novosibirsk, Russia
| | | | - R I Spitsyn
- Budker Institute of Nuclear Physics SB RAS, 630090 Novosibirsk, Russia
- Novosibirsk State University, 630090 Novosibirsk, Russia
| | - P V Tuev
- Budker Institute of Nuclear Physics SB RAS, 630090 Novosibirsk, Russia
- Novosibirsk State University, 630090 Novosibirsk, Russia
| | | | - L Verra
- CERN, 1211 Geneva, Switzerland
- University of Milan, 20122 Milan, Italy
| | | | - J Vieira
- GoLP/Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisbon, Portugal
| | | | - C P Welsch
- Cockcroft Institute, WA4 4AD Daresbury, United Kingdom
- University of Liverpool, L69 7ZE Liverpool, United Kingdom
| | - B Williamson
- University of Manchester, M13 9PL Manchester, United Kingdom
- Cockcroft Institute, WA4 4AD Daresbury, United Kingdom
| | - M Wing
- UCL, WC1E 6BT London, United Kingdom
| | | | - G Xia
- University of Manchester, M13 9PL Manchester, United Kingdom
- Cockcroft Institute, WA4 4AD Daresbury, United Kingdom
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13
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Kubkowska M, Czarnecka A, Fornal T, Gruca M, Jabłoński S, Krawczyk N, Ryć L, Burhenn R, Buttenschön B, Geiger B, Grulke O, Langenberg A, Marchuk O, McCarthy KJ, Neuner U, Nicolai D, Pablant N, Schweer B, Thomsen H, Wegner T, Drews P, Hollfeld KP, Killer C, Krings T, Offermanns G, Satheeswaran G, Kunkel F. Plasma impurities observed by a pulse height analysis diagnostic during the divertor campaign of the Wendelstein 7-X stellarator. Rev Sci Instrum 2018; 89:10F111. [PMID: 30399723 DOI: 10.1063/1.5038850] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/06/2018] [Accepted: 07/16/2018] [Indexed: 06/08/2023]
Abstract
The paper reports on the optimization process of the soft X-ray pulse height analyzer installed on the Wendelstein 7-X (W7-X) stellarator. It is a 3-channel system that records X-ray spectra in the range from 0.6 to 19.6 keV. X-ray spectra, with a temporal and spatial resolution of 100 ms and 2.5 cm (depending on selected slit sizes), respectively, are line integrated along a line-of-sight that crosses near to the plasma center. In the second W7-X operation phase with a carbon test divertor unit, light impurities, e.g., carbon and oxygen, were observed as well as mid- to high-Z elements, e.g., sulfur, chlorine, chromium, manganese, iron, and nickel. In addition, X-ray lines from several tracer elements have been observed after the laser blow-off injection of different impurities, e.g., silicon, titanium, and iron, and during discharges with prefill or a gas puff of neon or argon. These measurements were achieved by optimizing light absorber-foil selection, which defines the detected energy range, and remotely controlled pinhole size, which defines photon flux. The identification of X-ray lines was confirmed by other spectroscopic diagnostics, e.g., by the High-Efficiency XUV Overview Spectrometer, HEXOS, and high-resolution X-ray imaging spectrometer, HR-XIS.
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Affiliation(s)
- M Kubkowska
- Institute of Plasma Physics and Laser Microfusion, Hery 23, 01-497 Warsaw, Poland
| | - A Czarnecka
- Institute of Plasma Physics and Laser Microfusion, Hery 23, 01-497 Warsaw, Poland
| | - T Fornal
- Institute of Plasma Physics and Laser Microfusion, Hery 23, 01-497 Warsaw, Poland
| | - M Gruca
- Institute of Plasma Physics and Laser Microfusion, Hery 23, 01-497 Warsaw, Poland
| | - S Jabłoński
- Institute of Plasma Physics and Laser Microfusion, Hery 23, 01-497 Warsaw, Poland
| | - N Krawczyk
- Institute of Plasma Physics and Laser Microfusion, Hery 23, 01-497 Warsaw, Poland
| | - L Ryć
- Institute of Plasma Physics and Laser Microfusion, Hery 23, 01-497 Warsaw, Poland
| | - R Burhenn
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - B Buttenschön
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - B Geiger
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - O Grulke
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - A Langenberg
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - O Marchuk
- Forschungszentrum, 52425 Juelich, Germany
| | - K J McCarthy
- Laboratorio Nacional de Fusion, CIEMAT, Avenida Complutense, Madrid, Spain
| | - U Neuner
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - D Nicolai
- Forschungszentrum, 52425 Juelich, Germany
| | - N Pablant
- Princeton Plasma Physics Laboratory, Princeton, New Jersey 08540, USA
| | - B Schweer
- Forschungszentrum, 52425 Juelich, Germany
| | - H Thomsen
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - Th Wegner
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - P Drews
- Forschungszentrum, 52425 Juelich, Germany
| | | | - C Killer
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - Th Krings
- Forschungszentrum, 52425 Juelich, Germany
| | | | | | - F Kunkel
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
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14
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Adli E, Ahuja A, Apsimon O, Apsimon R, Bachmann AM, Barrientos D, Batsch F, Bauche J, Berglyd Olsen VK, Bernardini M, Bohl T, Bracco C, Braunmüller F, Burt G, Buttenschön B, Caldwell A, Cascella M, Chappell J, Chevallay E, Chung M, Cooke D, Damerau H, Deacon L, Deubner LH, Dexter A, Doebert S, Farmer J, Fedosseev VN, Fiorito R, Fonseca RA, Friebel F, Garolfi L, Gessner S, Gorgisyan I, Gorn AA, Granados E, Grulke O, Gschwendtner E, Hansen J, Helm A, Henderson JR, Hüther M, Ibison M, Jensen L, Jolly S, Keeble F, Kim SY, Kraus F, Li Y, Liu S, Lopes N, Lotov KV, Maricalva Brun L, Martyanov M, Mazzoni S, Medina Godoy D, Minakov VA, Mitchell J, Molendijk JC, Moody JT, Moreira M, Muggli P, Öz E, Pasquino C, Pardons A, Peña Asmus F, Pepitone K, Perera A, Petrenko A, Pitman S, Pukhov A, Rey S, Rieger K, Ruhl H, Schmidt JS, Shalimova IA, Sherwood P, Silva LO, Soby L, Sosedkin AP, Speroni R, Spitsyn RI, Tuev PV, Turner M, Velotti F, Verra L, Verzilov VA, Vieira J, Welsch CP, Williamson B, Wing M, Woolley B, Xia G. Acceleration of electrons in the plasma wakefield of a proton bunch. Nature 2018; 561:363-367. [PMID: 30188496 PMCID: PMC6786972 DOI: 10.1038/s41586-018-0485-4] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2018] [Accepted: 08/14/2018] [Indexed: 12/03/2022]
Abstract
High-energy particle accelerators have been crucial in providing a deeper understanding of fundamental particles and the forces that govern their interactions. To increase the energy of the particles or to reduce the size of the accelerator, new acceleration schemes need to be developed. Plasma wakefield acceleration1–5, in which the electrons in a plasma are excited, leading to strong electric fields (so called ‘wakefields’), is one such promising acceleration technique. Experiments have shown that an intense laser pulse6–9 or electron bunch10,11 traversing a plasma can drive electric fields of tens of gigavolts per metre and above—well beyond those achieved in conventional radio-frequency accelerators (about 0.1 gigavolt per metre). However, the low stored energy of laser pulses and electron bunches means that multiple acceleration stages are needed to reach very high particle energies5,12. The use of proton bunches is compelling because they have the potential to drive wakefields and to accelerate electrons to high energy in a single acceleration stage13. Long, thin proton bunches can be used because they undergo a process called self-modulation14–16, a particle–plasma interaction that splits the bunch longitudinally into a series of high-density microbunches, which then act resonantly to create large wakefields. The Advanced Wakefield (AWAKE) experiment at CERN17–19 uses high-intensity proton bunches—in which each proton has an energy of 400 gigaelectronvolts, resulting in a total bunch energy of 19 kilojoules—to drive a wakefield in a ten-metre-long plasma. Electron bunches are then injected into this wakefield. Here we present measurements of electrons accelerated up to two gigaelectronvolts at the AWAKE experiment, in a demonstration of proton-driven plasma wakefield acceleration. Measurements were conducted under various plasma conditions and the acceleration was found to be consistent and reliable. The potential for this scheme to produce very high-energy electron bunches in a single accelerating stage20 means that our results are an important step towards the development of future high-energy particle accelerators21,22. Electron acceleration to very high energies is achieved in a single step by injecting electrons into a ‘wake’ of charge created in a 10-metre-long plasma by speeding long proton bunches.
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Affiliation(s)
- E Adli
- University of Oslo, Oslo, Norway
| | | | - O Apsimon
- University of Manchester, Manchester, UK.,Cockcroft Institute, Daresbury, UK
| | - R Apsimon
- Cockcroft Institute, Daresbury, UK.,Lancaster University, Lancaster, UK
| | - A-M Bachmann
- CERN, Geneva, Switzerland.,Max Planck Institute for Physics, Munich, Germany.,Technical University Munich, Munich, Germany
| | | | - F Batsch
- CERN, Geneva, Switzerland.,Max Planck Institute for Physics, Munich, Germany.,Technical University Munich, Munich, Germany
| | | | | | | | - T Bohl
- CERN, Geneva, Switzerland
| | | | | | - G Burt
- Cockcroft Institute, Daresbury, UK.,Lancaster University, Lancaster, UK
| | - B Buttenschön
- Max Planck Institute for Plasma Physics, Greifswald, Germany
| | - A Caldwell
- Max Planck Institute for Physics, Munich, Germany
| | | | | | | | | | | | | | | | - L H Deubner
- Philipps-Universität Marburg, Marburg, Germany
| | - A Dexter
- Cockcroft Institute, Daresbury, UK.,Lancaster University, Lancaster, UK
| | | | - J Farmer
- Heinrich-Heine-University of Düsseldorf, Düsseldorf, Germany
| | | | - R Fiorito
- Cockcroft Institute, Daresbury, UK.,University of Liverpool, Liverpool, UK
| | - R A Fonseca
- ISCTE-Instituto Universitéario de Lisboa, Lisbon, Portugal
| | | | | | | | | | - A A Gorn
- Budker Institute of Nuclear Physics SB RAS, Novosibirsk, Russia.,Novosibirsk State University, Novosibirsk, Russia
| | | | - O Grulke
- Max Planck Institute for Plasma Physics, Greifswald, Germany.,Technical University of Denmark, Lyngby, Denmark
| | | | | | - A Helm
- GoLP/Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, Lisbon, Portugal
| | - J R Henderson
- Cockcroft Institute, Daresbury, UK.,Lancaster University, Lancaster, UK
| | - M Hüther
- Max Planck Institute for Physics, Munich, Germany
| | - M Ibison
- Cockcroft Institute, Daresbury, UK.,University of Liverpool, Liverpool, UK
| | | | | | | | | | - F Kraus
- Philipps-Universität Marburg, Marburg, Germany
| | - Y Li
- University of Manchester, Manchester, UK.,Cockcroft Institute, Daresbury, UK
| | - S Liu
- TRIUMF, Vancouver, British Columbia, Canada
| | - N Lopes
- GoLP/Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, Lisbon, Portugal
| | - K V Lotov
- Budker Institute of Nuclear Physics SB RAS, Novosibirsk, Russia.,Novosibirsk State University, Novosibirsk, Russia
| | | | - M Martyanov
- Max Planck Institute for Physics, Munich, Germany
| | | | | | - V A Minakov
- Budker Institute of Nuclear Physics SB RAS, Novosibirsk, Russia.,Novosibirsk State University, Novosibirsk, Russia
| | - J Mitchell
- Cockcroft Institute, Daresbury, UK.,Lancaster University, Lancaster, UK
| | | | - J T Moody
- Max Planck Institute for Physics, Munich, Germany
| | - M Moreira
- CERN, Geneva, Switzerland.,GoLP/Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, Lisbon, Portugal
| | - P Muggli
- CERN, Geneva, Switzerland.,Max Planck Institute for Physics, Munich, Germany
| | - E Öz
- Max Planck Institute for Physics, Munich, Germany
| | | | | | - F Peña Asmus
- Max Planck Institute for Physics, Munich, Germany.,Technical University Munich, Munich, Germany
| | | | - A Perera
- Cockcroft Institute, Daresbury, UK.,University of Liverpool, Liverpool, UK
| | - A Petrenko
- CERN, Geneva, Switzerland.,Budker Institute of Nuclear Physics SB RAS, Novosibirsk, Russia
| | - S Pitman
- Cockcroft Institute, Daresbury, UK.,Lancaster University, Lancaster, UK
| | - A Pukhov
- Heinrich-Heine-University of Düsseldorf, Düsseldorf, Germany
| | - S Rey
- CERN, Geneva, Switzerland
| | - K Rieger
- Max Planck Institute for Physics, Munich, Germany
| | - H Ruhl
- Ludwig-Maximilians-Universität, Munich, Germany
| | | | - I A Shalimova
- Novosibirsk State University, Novosibirsk, Russia.,Institute of Computational Mathematics and Mathematical Geophysics SB RAS, Novosibirsk, Russia
| | | | - L O Silva
- GoLP/Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, Lisbon, Portugal
| | - L Soby
- CERN, Geneva, Switzerland
| | - A P Sosedkin
- Budker Institute of Nuclear Physics SB RAS, Novosibirsk, Russia.,Novosibirsk State University, Novosibirsk, Russia
| | | | - R I Spitsyn
- Budker Institute of Nuclear Physics SB RAS, Novosibirsk, Russia.,Novosibirsk State University, Novosibirsk, Russia
| | - P V Tuev
- Budker Institute of Nuclear Physics SB RAS, Novosibirsk, Russia.,Novosibirsk State University, Novosibirsk, Russia
| | | | | | - L Verra
- CERN, Geneva, Switzerland.,University of Milan, Milan, Italy
| | | | - J Vieira
- GoLP/Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, Lisbon, Portugal
| | - C P Welsch
- Cockcroft Institute, Daresbury, UK.,University of Liverpool, Liverpool, UK
| | - B Williamson
- University of Manchester, Manchester, UK.,Cockcroft Institute, Daresbury, UK
| | | | | | - G Xia
- University of Manchester, Manchester, UK.,Cockcroft Institute, Daresbury, UK
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15
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Wegner T, Geiger B, Kunkel F, Burhenn R, Schröder T, Biedermann C, Buttenschön B, Cseh G, Drews P, Grulke O, Hollfeld K, Killer C, Kocsis G, Krings T, Langenberg A, Marchuk O, Neuner U, Nicolai D, Offermanns G, Pablant NA, Rahbarnia K, Satheeswaran G, Schilling J, Schweer B, Szepesi T, Thomsen H. Design, capabilities, and first results of the new laser blow-off system on Wendelstein 7-X. Rev Sci Instrum 2018; 89:073505. [PMID: 30068134 DOI: 10.1063/1.5037543] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/25/2018] [Accepted: 06/21/2018] [Indexed: 06/08/2023]
Abstract
We present a detailed overview and first results of the new laser blow-off system on the stellarator Wendelstein 7-X. The system allows impurity transport studies by the repetitive and controlled injection of different tracer ions into the plasma edge. A Nd:YAG laser is used to ablate a thin metal film, coated on a glass plate, with a repetition rate of up to 20 Hz. A remote-controlled adjustable optical system allows the variation of the laser spot diameter and enables the spot positioning to non-ablated areas on the target between laser pulses. During first experiments, clear spectral lines from higher ionization stages of the tracer ions have been observed in the X-ray to the extreme ultraviolet spectral range. The temporal behavior of the measured emission allows the estimate of transport properties, e.g., impurity transport times in the order of 100 ms. Although the strong injection of impurities is well detectable, the global plasma parameters are barely changed.
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Affiliation(s)
- Th Wegner
- Max-Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - B Geiger
- Max-Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - F Kunkel
- Max-Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - R Burhenn
- Max-Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - T Schröder
- Max-Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - C Biedermann
- Max-Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - B Buttenschön
- Max-Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - G Cseh
- Wigner Research Center for Physics, 1121 Budapest, Hungary
| | - P Drews
- Forschungszentrum Jülich, 52425 Jülich, Germany
| | - O Grulke
- Max-Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - K Hollfeld
- Forschungszentrum Jülich, 52425 Jülich, Germany
| | - C Killer
- Max-Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - G Kocsis
- Wigner Research Center for Physics, 1121 Budapest, Hungary
| | - T Krings
- Forschungszentrum Jülich, 52425 Jülich, Germany
| | - A Langenberg
- Max-Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - O Marchuk
- Forschungszentrum Jülich, 52425 Jülich, Germany
| | - U Neuner
- Max-Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - D Nicolai
- Forschungszentrum Jülich, 52425 Jülich, Germany
| | | | - N A Pablant
- Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543, USA
| | - K Rahbarnia
- Max-Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | | | - J Schilling
- Max-Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - B Schweer
- Forschungszentrum Jülich, 52425 Jülich, Germany
| | - T Szepesi
- Wigner Research Center for Physics, 1121 Budapest, Hungary
| | - H Thomsen
- Max-Planck Institute for Plasma Physics, 17491 Greifswald, Germany
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16
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Krychowiak M, Adnan A, Alonso A, Andreeva T, Baldzuhn J, Barbui T, Beurskens M, Biel W, Biedermann C, Blackwell BD, Bosch HS, Bozhenkov S, Brakel R, Bräuer T, Brotas de Carvalho B, Burhenn R, Buttenschön B, Cappa A, Cseh G, Czarnecka A, Dinklage A, Drews P, Dzikowicka A, Effenberg F, Endler M, Erckmann V, Estrada T, Ford O, Fornal T, Frerichs H, Fuchert G, Geiger J, Grulke O, Harris JH, Hartfuß HJ, Hartmann D, Hathiramani D, Hirsch M, Höfel U, Jabłoński S, Jakubowski MW, Kaczmarczyk J, Klinger T, Klose S, Knauer J, Kocsis G, König R, Kornejew P, Krämer-Flecken A, Krawczyk N, Kremeyer T, Książek I, Kubkowska M, Langenberg A, Laqua HP, Laux M, Lazerson S, Liang Y, Liu SC, Lorenz A, Marchuk AO, Marsen S, Moncada V, Naujoks D, Neilson H, Neubauer O, Neuner U, Niemann H, Oosterbeek JW, Otte M, Pablant N, Pasch E, Sunn Pedersen T, Pisano F, Rahbarnia K, Ryć L, Schmitz O, Schmuck S, Schneider W, Schröder T, Schuhmacher H, Schweer B, Standley B, Stange T, Stephey L, Svensson J, Szabolics T, Szepesi T, Thomsen H, Travere JM, Trimino Mora H, Tsuchiya H, Weir GM, Wenzel U, Werner A, Wiegel B, Windisch T, Wolf R, Wurden GA, Zhang D, Zimbal A, Zoletnik S. Overview of diagnostic performance and results for the first operation phase in Wendelstein 7-X (invited). Rev Sci Instrum 2016; 87:11D304. [PMID: 27910389 DOI: 10.1063/1.4964376] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Wendelstein 7-X, a superconducting optimized stellarator built in Greifswald/Germany, started its first plasmas with the last closed flux surface (LCFS) defined by 5 uncooled graphite limiters in December 2015. At the end of the 10 weeks long experimental campaign (OP1.1) more than 20 independent diagnostic systems were in operation, allowing detailed studies of many interesting plasma phenomena. For example, fast neutral gas manometers supported by video cameras (including one fast-frame camera with frame rates of tens of kHz) as well as visible cameras with different interference filters, with field of views covering all ten half-modules of the stellarator, discovered a MARFE-like radiation zone on the inboard side of machine module 4. This structure is presumably triggered by an inadvertent plasma-wall interaction in module 4 resulting in a high impurity influx that terminates some discharges by radiation cooling. The main plasma parameters achieved in OP1.1 exceeded predicted values in discharges of a length reaching 6 s. Although OP1.1 is characterized by short pulses, many of the diagnostics are already designed for quasi-steady state operation of 30 min discharges heated at 10 MW of ECRH. An overview of diagnostic performance for OP1.1 is given, including some highlights from the physics campaigns.
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Affiliation(s)
- M Krychowiak
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - A Adnan
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - A Alonso
- Laboratorio Nacional de Fusión, CIEMAT, Avenida Complutense, Madrid, Spain
| | - T Andreeva
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - J Baldzuhn
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - T Barbui
- University of Wisconsin, Engineering Drive, Madison, Wisconsin 53706, USA
| | - M Beurskens
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - W Biel
- Forschungszentrum Jülich GmbH, Institut für Energie- und Klimaforschung - Plasmaphysik, Partner of the Trilateral Euregio Cluster (TEC), 52425 Jülich, Germany
| | - C Biedermann
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - B D Blackwell
- Australian National University, Acton ACT, 2601 Canberra, Australia
| | - H S Bosch
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - S Bozhenkov
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - R Brakel
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - T Bräuer
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - B Brotas de Carvalho
- Instituto de Plasmas e Fusao Nuclear, Avenue Rovisco Pais 1, 1049-001 Lisboa, Portugal
| | - R Burhenn
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - B Buttenschön
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - A Cappa
- Laboratorio Nacional de Fusión, CIEMAT, Avenida Complutense, Madrid, Spain
| | - G Cseh
- Wigner Research Centre for Physics, Konkoly Thege 29-33, H-1121 Budapest, Hungary
| | - A Czarnecka
- Institute of Plasma Physics and Laser Microfusion, Hery Street 23, 01-497 Warsaw, Poland
| | - A Dinklage
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - P Drews
- Forschungszentrum Jülich GmbH, Institut für Energie- und Klimaforschung - Plasmaphysik, Partner of the Trilateral Euregio Cluster (TEC), 52425 Jülich, Germany
| | - A Dzikowicka
- University of Szczecin, al. Papieża Jana Pawła II 22A, Szczecin, Poland
| | - F Effenberg
- University of Wisconsin, Engineering Drive, Madison, Wisconsin 53706, USA
| | - M Endler
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - V Erckmann
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - T Estrada
- Laboratorio Nacional de Fusión, CIEMAT, Avenida Complutense, Madrid, Spain
| | - O Ford
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - T Fornal
- Institute of Plasma Physics and Laser Microfusion, Hery Street 23, 01-497 Warsaw, Poland
| | - H Frerichs
- University of Wisconsin, Engineering Drive, Madison, Wisconsin 53706, USA
| | - G Fuchert
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - J Geiger
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - O Grulke
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - J H Harris
- Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - H J Hartfuß
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - D Hartmann
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - D Hathiramani
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - M Hirsch
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - U Höfel
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - S Jabłoński
- Institute of Plasma Physics and Laser Microfusion, Hery Street 23, 01-497 Warsaw, Poland
| | - M W Jakubowski
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - J Kaczmarczyk
- Institute of Plasma Physics and Laser Microfusion, Hery Street 23, 01-497 Warsaw, Poland
| | - T Klinger
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - S Klose
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - J Knauer
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - G Kocsis
- Wigner Research Centre for Physics, Konkoly Thege 29-33, H-1121 Budapest, Hungary
| | - R König
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - P Kornejew
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - A Krämer-Flecken
- Forschungszentrum Jülich GmbH, Institut für Energie- und Klimaforschung - Plasmaphysik, Partner of the Trilateral Euregio Cluster (TEC), 52425 Jülich, Germany
| | - N Krawczyk
- Institute of Plasma Physics and Laser Microfusion, Hery Street 23, 01-497 Warsaw, Poland
| | - T Kremeyer
- University of Wisconsin, Engineering Drive, Madison, Wisconsin 53706, USA
| | - I Książek
- Opole University, pl. Kopernika 11a, 45-040 Opole, Poland
| | - M Kubkowska
- Institute of Plasma Physics and Laser Microfusion, Hery Street 23, 01-497 Warsaw, Poland
| | - A Langenberg
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - H P Laqua
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - M Laux
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - S Lazerson
- Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543, USA
| | - Y Liang
- Forschungszentrum Jülich GmbH, Institut für Energie- und Klimaforschung - Plasmaphysik, Partner of the Trilateral Euregio Cluster (TEC), 52425 Jülich, Germany
| | - S C Liu
- Forschungszentrum Jülich GmbH, Institut für Energie- und Klimaforschung - Plasmaphysik, Partner of the Trilateral Euregio Cluster (TEC), 52425 Jülich, Germany
| | - A Lorenz
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - A O Marchuk
- Forschungszentrum Jülich GmbH, Institut für Energie- und Klimaforschung - Plasmaphysik, Partner of the Trilateral Euregio Cluster (TEC), 52425 Jülich, Germany
| | - S Marsen
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - V Moncada
- CEA, IRFM, F-13108 Saint-Paul-lez-Durance, France
| | - D Naujoks
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - H Neilson
- Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543, USA
| | - O Neubauer
- Forschungszentrum Jülich GmbH, Institut für Energie- und Klimaforschung - Plasmaphysik, Partner of the Trilateral Euregio Cluster (TEC), 52425 Jülich, Germany
| | - U Neuner
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - H Niemann
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - J W Oosterbeek
- Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - M Otte
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - N Pablant
- Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543, USA
| | - E Pasch
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - T Sunn Pedersen
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - F Pisano
- University of Cagliari, Via Università, 40, 09124 Cagliari, Italy
| | - K Rahbarnia
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - L Ryć
- Institute of Plasma Physics and Laser Microfusion, Hery Street 23, 01-497 Warsaw, Poland
| | - O Schmitz
- University of Wisconsin, Engineering Drive, Madison, Wisconsin 53706, USA
| | - S Schmuck
- Culham Science Centre, Abingdon OX14 3DB, United Kingdom
| | - W Schneider
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - T Schröder
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - H Schuhmacher
- Physikalisch-Technische Bundesanstalt, Bundesallee 100, 38116 Braunschweig, Germany
| | - B Schweer
- Forschungszentrum Jülich GmbH, Institut für Energie- und Klimaforschung - Plasmaphysik, Partner of the Trilateral Euregio Cluster (TEC), 52425 Jülich, Germany
| | - B Standley
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - T Stange
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - L Stephey
- University of Wisconsin, Engineering Drive, Madison, Wisconsin 53706, USA
| | - J Svensson
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - T Szabolics
- Wigner Research Centre for Physics, Konkoly Thege 29-33, H-1121 Budapest, Hungary
| | - T Szepesi
- Wigner Research Centre for Physics, Konkoly Thege 29-33, H-1121 Budapest, Hungary
| | - H Thomsen
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - J-M Travere
- CEA, IRFM, F-13108 Saint-Paul-lez-Durance, France
| | - H Trimino Mora
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - H Tsuchiya
- NIFS National Institute for Fusion Science, 322-6 Oroshi-cho, Toki 509-5292, Japan
| | - G M Weir
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - U Wenzel
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - A Werner
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - B Wiegel
- Physikalisch-Technische Bundesanstalt, Bundesallee 100, 38116 Braunschweig, Germany
| | - T Windisch
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - R Wolf
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - G A Wurden
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
| | - D Zhang
- Max Planck Institute for Plasma Physics, 17491 Greifswald, Germany
| | - A Zimbal
- Physikalisch-Technische Bundesanstalt, Bundesallee 100, 38116 Braunschweig, Germany
| | - S Zoletnik
- Wigner Research Centre for Physics, Konkoly Thege 29-33, H-1121 Budapest, Hungary
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