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Hirschman J, Lemons R, Wang M, Kroetz P, Carbajo S. Design, tuning, and blackbox optimization of laser systems. OPTICS EXPRESS 2024; 32:15610-15622. [PMID: 38859208 DOI: 10.1364/oe.520542] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/13/2024] [Accepted: 03/22/2024] [Indexed: 06/12/2024]
Abstract
Chirped pulse amplification (CPA) and subsequent nonlinear optical (NLO) systems constitute the backbone of myriad advancements in semiconductor manufacturing, communications, biology, defense, and beyond. Accurately and efficiently modeling CPA+NLO-based laser systems is challenging because of the complex coupled processes and diverse simulation frameworks. Our modular start-to-end model unlocks the potential for exciting new optimization and inverse design approaches reliant on data-driven machine learning methods, providing a means to create tailored CPA+NLO systems unattainable with current models. To demonstrate this new, to our knowledge, technical capability, we present a study on the LCLS-II photo-injector laser, representative of a high-power and spectro-temporally non-trivial CPA+NLO system.
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2
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Prat E, Dijkstal P, Ferrari E, Reiche S. Demonstration of Large Bandwidth Hard X-Ray Free-Electron Laser Pulses at SwissFEL. PHYSICAL REVIEW LETTERS 2020; 124:074801. [PMID: 32142307 DOI: 10.1103/physrevlett.124.074801] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/11/2019] [Revised: 12/12/2019] [Accepted: 01/14/2020] [Indexed: 06/10/2023]
Abstract
We have produced hard x-ray free-electron laser (FEL) radiation with unprecedented large bandwidth tunable up to 2%. The experiments have been carried out at SwissFEL, the x-ray FEL facility at the Paul Scherrer Institute in Switzerland. The bandwidth is enhanced by maximizing the energy chirp of the electron beam, which is accomplished by optimizing the compression setup. We demonstrate continuous tunability of the bandwidth with a simple method only requiring a quadrupole magnet. The generation of such broadband FEL pulses will improve the efficiency of many techniques such as x-ray crystallography and spectroscopy, opening the door to significant progress in photon science. It has already been demonstrated that the broadband pulses of SwissFEL are beneficial to enhance the performance of crystallography, and further SwissFEL users plan to exploit this large bandwidth radiation to improve the efficiency of their measurement techniques.
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Affiliation(s)
- Eduard Prat
- Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland
| | - Philipp Dijkstal
- Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland
- ETH Zürich, CH-8093 Zürich, Switzerland
| | | | - Sven Reiche
- Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland
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3
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Coherent THz Emission Enhanced by Coherent Synchrotron Radiation Wakefield. Sci Rep 2018; 8:11661. [PMID: 30076346 PMCID: PMC6076281 DOI: 10.1038/s41598-018-30125-1] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2018] [Accepted: 07/25/2018] [Indexed: 11/08/2022] Open
Abstract
We demonstrate that emission of coherent transition radiation by a ∼1 GeV energy-electron beam passing through an Al foil is enhanced in intensity and extended in frequency spectral range, by the energy correlation established along the beam by coherent synchrotron radiation wakefield, in the presence of a proper electron optics in the beam delivery system. Analytical and numerical models, based on experimental electron beam parameters collected at the FERMI free electron laser (FEL), predict transition radiation with two intensity peaks at ∼0.3 THz and ∼1.5 THz, and extending up to 8.5 THz with intensity above 20 dB w.r.t. the main peak. Up to 80-µJ pulse energy integrated over the full bandwidth is expected at the source, and in agreement with experimental pulse energy measurements. By virtue of its implementation in an FEL beam dump line, this work promises dissemination of user-oriented multi-THz beamlines parasitic and self-synchronized to EUV and x-ray FELs.
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4
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Penco G, Allaria E, Cudin I, Di Mitri S, Gauthier D, Spampinati S, Trovó M, Giannessi L, Roussel E, Bettoni S, Craievich P, Ferrari E. Passive Linearization of the Magnetic Bunch Compression Using Self-Induced Fields. PHYSICAL REVIEW LETTERS 2017; 119:184802. [PMID: 29219607 DOI: 10.1103/physrevlett.119.184802] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/04/2017] [Indexed: 06/07/2023]
Abstract
In linac-driven free-electron lasers, colliders, and energy recovery linacs, a common way to compress the electron bunch to kiloampere level is based upon the implementation of a magnetic dispersive element that converts particle energy deviation into a path-length difference. Nonlinearities of such a process are usually compensated by enabling a high harmonic rf structure properly tuned in amplitude and phase. This approach is however not straightforward, e.g., in C-band and X-band linacs. In this Letter we demonstrate that the longitudinal self-induced field excited by the electron beam itself is able to linearize the compression process without any use of high harmonic rf structure. The method is implemented at the FERMI linac, with the resulting high quality beam used to drive the seeded free-electron laser during user experiments.
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Affiliation(s)
- G Penco
- Elettra-Sincrotrone Trieste, Area Science Park, 34149 Trieste, Italy
| | - E Allaria
- Elettra-Sincrotrone Trieste, Area Science Park, 34149 Trieste, Italy
| | - I Cudin
- Elettra-Sincrotrone Trieste, Area Science Park, 34149 Trieste, Italy
| | - S Di Mitri
- Elettra-Sincrotrone Trieste, Area Science Park, 34149 Trieste, Italy
| | - D Gauthier
- LIDYL, CEA, CNRS, Universit Paris-Saclay, CEA Saclay, 91191 Gif-sur-Yvette, France
| | - S Spampinati
- Elettra-Sincrotrone Trieste, Area Science Park, 34149 Trieste, Italy
| | - M Trovó
- Elettra-Sincrotrone Trieste, Area Science Park, 34149 Trieste, Italy
| | - L Giannessi
- Elettra-Sincrotrone Trieste, Area Science Park, 34149 Trieste, Italy
- ENEA C.R. Frascati, Via E. Fermi 45, 00044 Frascati (Roma), Italy
| | - E Roussel
- Elettra-Sincrotrone Trieste, Area Science Park, 34149 Trieste, Italy
- Laboratoire PhLAM, UMR CNRS 8523, Université Lille 1, Sciences et Technologies, 59655 Villeneuve d'Ascq, France
| | - S Bettoni
- Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland
| | - P Craievich
- Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland
| | - E Ferrari
- Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland
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5
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Ha G, Cho MH, Namkung W, Power JG, Doran DS, Wisniewski EE, Conde M, Gai W, Liu W, Whiteford C, Gao Q, Kim KJ, Zholents A, Sun YE, Jing C, Piot P. Precision Control of the Electron Longitudinal Bunch Shape Using an Emittance-Exchange Beam Line. PHYSICAL REVIEW LETTERS 2017; 118:104801. [PMID: 28339245 DOI: 10.1103/physrevlett.118.104801] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/19/2016] [Indexed: 06/06/2023]
Abstract
We report on the experimental generation of relativistic electron bunches with a tunable longitudinal bunch shape. A longitudinal bunch-shaping (LBS) beam line, consisting of a transverse mask followed by a transverse-to-longitudinal emittance exchange (EEX) beam line, is used to tailor the longitudinal bunch shape (or current profile) of the electron bunch. The mask shapes the bunch's horizontal profile, and the EEX beam line converts it to a corresponding longitudinal profile. The Argonne wakefield accelerator rf photoinjector delivers electron bunches into a LBS beam line to generate a variety of longitudinal bunch shapes. The quality of the longitudinal bunch shape is limited by various perturbations in the exchange process. We develop a simple method, based on the incident slope of the bunch, to significantly suppress the perturbations.
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Affiliation(s)
- G Ha
- POSTECH, Pohang, Gyeongbuk 37673, Republic of Korea
| | - M H Cho
- POSTECH, Pohang, Gyeongbuk 37673, Republic of Korea
| | - W Namkung
- POSTECH, Pohang, Gyeongbuk 37673, Republic of Korea
| | - J G Power
- Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - D S Doran
- Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - E E Wisniewski
- Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - M Conde
- Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - W Gai
- Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - W Liu
- Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - C Whiteford
- Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - Q Gao
- Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - K-J Kim
- Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - A Zholents
- Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - Y-E Sun
- Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - C Jing
- Euclid TechLabs, Solon, Ohio 44139, USA
| | - P Piot
- Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA
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6
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Andonian G, Barber S, O'Shea FH, Fedurin M, Kusche K, Swinson C, Rosenzweig JB. Generation of Ramped Current Profiles in Relativistic Electron Beams Using Wakefields in Dielectric Structures. PHYSICAL REVIEW LETTERS 2017; 118:054802. [PMID: 28211719 DOI: 10.1103/physrevlett.118.054802] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/08/2016] [Indexed: 06/06/2023]
Abstract
Temporal pulse tailoring of charged-particle beams is essential to optimize efficiency in collinear wakefield acceleration schemes. In this Letter, we demonstrate a novel phase space manipulation method that employs a beam wakefield interaction in a dielectric structure, followed by bunch compression in a permanent magnet chicane, to longitudinally tailor the pulse shape of an electron beam. This compact, passive, approach was used to generate a nearly linearly ramped current profile in a relativistic electron beam experiment carried out at the Brookhaven National Laboratory Accelerator Test Facility. Here, we report on these experimental results including beam and wakefield diagnostics and pulse profile reconstruction techniques.
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Affiliation(s)
- G Andonian
- Department of Physics and Astronomy, UCLA, Los Angeles, California 90095, USA
- RadiaBeam Technologies, Santa Monica, California 90404, USA
| | - S Barber
- Department of Physics and Astronomy, UCLA, Los Angeles, California 90095, USA
| | - F H O'Shea
- RadiaBeam Technologies, Santa Monica, California 90404, USA
| | - M Fedurin
- Accelerator Test Facility, Brookhaven National Laboratory, Upton, New York 11973, USA
| | - K Kusche
- Accelerator Test Facility, Brookhaven National Laboratory, Upton, New York 11973, USA
| | - C Swinson
- Accelerator Test Facility, Brookhaven National Laboratory, Upton, New York 11973, USA
| | - J B Rosenzweig
- Department of Physics and Astronomy, UCLA, Los Angeles, California 90095, USA
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7
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Prat E, Calvi M, Reiche S. Generation of ultra-large-bandwidth X-ray free-electron-laser pulses with a transverse-gradient undulator. JOURNAL OF SYNCHROTRON RADIATION 2016; 23:874-9. [PMID: 27359135 PMCID: PMC5315094 DOI: 10.1107/s1600577516007177] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/19/2016] [Accepted: 04/27/2016] [Indexed: 05/09/2023]
Abstract
A new and simple method to generate X-ray free-electron-laser radiation with unprecedented spectral bandwidth above the 10% level is presented. The broad bandwidth is achieved by sending a transversely tilted beam through a transverse-gradient undulator. The extent of the bandwidth can easily be controlled by variation of the beam tilt or the undulator gradient. Numerical simulations confirm the validity and feasibility of this method.
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Affiliation(s)
- Eduard Prat
- Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland
- Correspondence e-mail:
| | - Marco Calvi
- Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland
| | - Sven Reiche
- Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland
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8
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Gauthier D, Ribič PR, De Ninno G, Allaria E, Cinquegrana P, Danailov MB, Demidovich A, Ferrari E, Giannessi L. Generation of Phase-Locked Pulses from a Seeded Free-Electron Laser. PHYSICAL REVIEW LETTERS 2016; 116:024801. [PMID: 26824544 DOI: 10.1103/physrevlett.116.024801] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/13/2015] [Indexed: 05/19/2023]
Abstract
In a coherent control experiment, light pulses are used to guide the real-time evolution of a quantum system. This requires the coherence and the control of the pulses' electric-field carrier waves. In this work, we use frequency-domain interferometry to demonstrate the mutual coherence of time-delayed pulses generated by an extreme ultraviolet seeded free-electron laser. Furthermore, we use the driving seed laser to lock and precisely control the relative phase between the two free-electron laser pulses. This new capability opens the way to a multitude of coherent control experiments, which will take advantage of the high intensity, short wavelength, and short duration of the pulses generated by seeded free-electron lasers.
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Affiliation(s)
- David Gauthier
- Elettra-Sincrotrone Trieste, Strada Statale 14-km 163,5, 34149 Basovizza, Trieste, Italy
| | - Primož Rebernik Ribič
- Elettra-Sincrotrone Trieste, Strada Statale 14-km 163,5, 34149 Basovizza, Trieste, Italy
| | - Giovanni De Ninno
- Elettra-Sincrotrone Trieste, Strada Statale 14-km 163,5, 34149 Basovizza, Trieste, Italy
- Laboratory of Quantum Optics, University of Nova Gorica, 5001 Nova Gorica, Slovenia
| | - Enrico Allaria
- Elettra-Sincrotrone Trieste, Strada Statale 14-km 163,5, 34149 Basovizza, Trieste, Italy
| | - Paolo Cinquegrana
- Elettra-Sincrotrone Trieste, Strada Statale 14-km 163,5, 34149 Basovizza, Trieste, Italy
| | | | - Alexander Demidovich
- Elettra-Sincrotrone Trieste, Strada Statale 14-km 163,5, 34149 Basovizza, Trieste, Italy
| | - Eugenio Ferrari
- Elettra-Sincrotrone Trieste, Strada Statale 14-km 163,5, 34149 Basovizza, Trieste, Italy
- Università degli Studi di Trieste, Dipartimento di Fisica, Piazzale Europa 1, 34100 Trieste, Italy
| | - Luca Giannessi
- Elettra-Sincrotrone Trieste, Strada Statale 14-km 163,5, 34149 Basovizza, Trieste, Italy
- Theory Group ENEA Frascati, Via Enrico Fermi 45, 00044 Frascati, Italy
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9
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Widely tunable two-colour seeded free-electron laser source for resonant-pump resonant-probe magnetic scattering. Nat Commun 2016; 7:10343. [PMID: 26757813 PMCID: PMC4735510 DOI: 10.1038/ncomms10343] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2015] [Accepted: 12/03/2015] [Indexed: 11/28/2022] Open
Abstract
The advent of free-electron laser (FEL) sources delivering two synchronized pulses of different wavelengths (or colours) has made available a whole range of novel pump–probe experiments. This communication describes a major step forward using a new configuration of the FERMI FEL-seeded source to deliver two pulses with different wavelengths, each tunable independently over a broad spectral range with adjustable time delay. The FEL scheme makes use of two seed laser beams of different wavelengths and of a split radiator section to generate two extreme ultraviolet pulses from distinct portions of the same electron bunch. The tunability range of this new two-colour source meets the requirements of double-resonant FEL pump/FEL probe time-resolved studies. We demonstrate its performance in a proof-of-principle magnetic scattering experiment in Fe–Ni compounds, by tuning the FEL wavelengths to the Fe and Ni 3p resonances. Two-colour X-ray free electron laser is a powerful tool for pump–probe measurements, but currently constrained by limited tunability. Here, Ferrari et al. develop a configuration that allows tuning both the pump and the probe to specific electronic excitations, providing element selectivity.
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10
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Allaria E, Badano L, Bassanese S, Capotondi F, Castronovo D, Cinquegrana P, Danailov MB, D'Auria G, Demidovich A, De Monte R, De Ninno G, Di Mitri S, Diviacco B, Fawley WM, Ferianis M, Ferrari E, Gaio G, Gauthier D, Giannessi L, Iazzourene F, Kurdi G, Mahne N, Nikolov I, Parmigiani F, Penco G, Raimondi L, Rebernik P, Rossi F, Roussel E, Scafuri C, Serpico C, Sigalotti P, Spezzani C, Svandrlik M, Svetina C, Trovó M, Veronese M, Zangrando D, Zangrando M. The FERMI free-electron lasers. JOURNAL OF SYNCHROTRON RADIATION 2015; 22:485-491. [PMID: 25931057 DOI: 10.1107/s1600577515005366] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/29/2014] [Accepted: 03/15/2015] [Indexed: 06/04/2023]
Abstract
FERMI is a seeded free-electron laser (FEL) facility located at the Elettra laboratory in Trieste, Italy, and is now in user operation with its first FEL line, FEL-1, covering the wavelength range between 100 and 20 nm. The second FEL line, FEL-2, a high-gain harmonic generation double-stage cascade covering the wavelength range 20-4 nm, has also completed commissioning and the first user call has been recently opened. An overview of the typical operating modes of the facility is presented.
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Affiliation(s)
- E Allaria
- Elettra-Sincrotrone Trieste, Trieste, Italy
| | - L Badano
- Elettra-Sincrotrone Trieste, Trieste, Italy
| | | | | | | | | | | | - G D'Auria
- Elettra-Sincrotrone Trieste, Trieste, Italy
| | | | - R De Monte
- Elettra-Sincrotrone Trieste, Trieste, Italy
| | - G De Ninno
- Elettra-Sincrotrone Trieste, Trieste, Italy
| | - S Di Mitri
- Elettra-Sincrotrone Trieste, Trieste, Italy
| | - B Diviacco
- Elettra-Sincrotrone Trieste, Trieste, Italy
| | - W M Fawley
- Elettra-Sincrotrone Trieste, Trieste, Italy
| | - M Ferianis
- Elettra-Sincrotrone Trieste, Trieste, Italy
| | - E Ferrari
- Elettra-Sincrotrone Trieste, Trieste, Italy
| | - G Gaio
- Elettra-Sincrotrone Trieste, Trieste, Italy
| | - D Gauthier
- Elettra-Sincrotrone Trieste, Trieste, Italy
| | | | | | - G Kurdi
- Elettra-Sincrotrone Trieste, Trieste, Italy
| | - N Mahne
- Elettra-Sincrotrone Trieste, Trieste, Italy
| | - I Nikolov
- Elettra-Sincrotrone Trieste, Trieste, Italy
| | | | - G Penco
- Elettra-Sincrotrone Trieste, Trieste, Italy
| | - L Raimondi
- Elettra-Sincrotrone Trieste, Trieste, Italy
| | - P Rebernik
- Elettra-Sincrotrone Trieste, Trieste, Italy
| | - F Rossi
- Elettra-Sincrotrone Trieste, Trieste, Italy
| | - E Roussel
- Elettra-Sincrotrone Trieste, Trieste, Italy
| | - C Scafuri
- Elettra-Sincrotrone Trieste, Trieste, Italy
| | - C Serpico
- Elettra-Sincrotrone Trieste, Trieste, Italy
| | | | - C Spezzani
- Elettra-Sincrotrone Trieste, Trieste, Italy
| | | | - C Svetina
- Elettra-Sincrotrone Trieste, Trieste, Italy
| | - M Trovó
- Elettra-Sincrotrone Trieste, Trieste, Italy
| | - M Veronese
- Elettra-Sincrotrone Trieste, Trieste, Italy
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11
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Deng H, Zhang M, Feng C, Zhang T, Wang X, Lan T, Feng L, Zhang W, Liu X, Yao H, Shen L, Li B, Zhang J, Li X, Fang W, Wang D, Couprie ME, Lin G, Liu B, Gu Q, Wang D, Zhao Z. Experimental demonstration of longitudinal beam phase-space linearizer in a free-electron laser facility by corrugated structures. PHYSICAL REVIEW LETTERS 2014; 113:254802. [PMID: 25554888 DOI: 10.1103/physrevlett.113.254802] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/01/2014] [Indexed: 06/04/2023]
Abstract
Removal of the undesired time-energy correlations in the electron beam is of paramount importance for efficient lasing of a high-gain free-electron laser. Recently, it has been theoretically and experimentally demonstrated that the longitudinal wakefield excited by the electrons themselves in a corrugated structure allows for precise control of the electron beam phase space. In this Letter, we report the first utilization of a corrugated structure as a beam linearizer in the operation of a seeded free-electron laser driven by a 140 MeV linear accelerator, where a gain of ∼10 000 over spontaneous emission was achieved at the second harmonic of the 1047 nm seed laser, and a free-electron laser bandwidth narrowing by 50% was observed, in good agreement with the theoretical expectations.
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Affiliation(s)
- Haixiao Deng
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, People's Republic of China
| | - Meng Zhang
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, People's Republic of China
| | - Chao Feng
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, People's Republic of China
| | - Tong Zhang
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, People's Republic of China
| | - Xingtao Wang
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, People's Republic of China
| | - Taihe Lan
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, People's Republic of China
| | - Lie Feng
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, People's Republic of China
| | - Wenyan Zhang
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, People's Republic of China
| | - Xiaoqing Liu
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, People's Republic of China
| | - Haifeng Yao
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, People's Republic of China
| | - Lei Shen
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, People's Republic of China
| | - Bin Li
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, People's Republic of China
| | - Junqiang Zhang
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, People's Republic of China
| | - Xuan Li
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, People's Republic of China
| | - Wencheng Fang
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, People's Republic of China
| | - Dan Wang
- Department of Engineering Physics, Tsinghua University, Beijing 100084, People's Republic of China
| | | | - Guoqiang Lin
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, People's Republic of China
| | - Bo Liu
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, People's Republic of China
| | - Qiang Gu
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, People's Republic of China
| | - Dong Wang
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, People's Republic of China
| | - Zhentang Zhao
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, People's Republic of China
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12
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Di Mitri S, Spampinati S. Microbunching instability suppression via electron-magnetic-phase mixing. PHYSICAL REVIEW LETTERS 2014; 112:134802. [PMID: 24745429 DOI: 10.1103/physrevlett.112.134802] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/05/2013] [Indexed: 06/03/2023]
Abstract
Control of the microbunching instability is a fundamental requirement in modern high-brightness electron linacs, in order to prevent misleading responses of beam optical diagnostics and contamination in the generation of coherent radiation, such as free electron lasers. We present the first experimental demonstration of control and suppression of microbunching instability by means of particles' longitudinal phase mixing in a magnetic chicane. In the presence of phase mixing, the intensity of the beam-emitted optical transition radiation, which is used as an indicator of the instability gain at optical wavelengths, is reduced by one order of magnitude and brought to the same level provided, alternatively, by beam heating. The experimental results are in agreement with particle tracking and analytical evaluations of the instability gain. This article is extended to a discussion of applications of magnetic-phase mixing to the generation of quasicold high-brightness ultrarelativistic electron beams.
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Affiliation(s)
- S Di Mitri
- Elettra-Sincrotrone Trieste, 34149, Basovizza (TS), Italy
| | - S Spampinati
- Elettra-Sincrotrone Trieste, 34149, Basovizza (TS), Italy and University of Liverpool, Department of Physics, Liverpool, United Kingdom and Cockroft Institute, Sci-Tech Daresbury, Warrington, United Kingdom
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