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Scandale W, Andrisani F, Arduini G, Cerutti F, Garattini M, Gilardoni S, Masi A, Mirarchi D, Montesano S, Petrucci S, Redaelli S, Schoofs P, Rossi R, Breton D, Chaumat D, Dubos S, Maalmi J, Natochii A, Puill V, Stocchi A, Bagli E, Bandiera L, Germogli G, Guidi V, Mazzolari A, Murtas F, Addesa F, Cavoto G, Iacoangeli F, Galluccio F, Afonin AG, Chesnokov YA, Durum AA, Maisheev VA, Sandomirskiy YE, Yanovich AA, Kovalenko AD, Taratin AM, Smirnov GI, Desinov AS, Gavrikov YA, Ivanov YM, Lapina LP, Malyarenko LG, Skorobogatov VV, Fulcher J, James T, Hall G, Pesaresi M, Raymond M. Study of inelastic nuclear interactions of 400 GeV/c protons in bent silicon crystals for beam steering purposes. Eur Phys J C Part Fields 2018; 78:505. [PMID: 30956555 PMCID: PMC6417461 DOI: 10.1140/epjc/s10052-018-5985-8] [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] [Figures] [Subscribe] [Scholar Register] [Received: 02/14/2018] [Accepted: 06/11/2018] [Indexed: 06/09/2023]
Abstract
Inelastic nuclear interaction probability of 400 GeV/c protons interacting with bent silicon crystals was investigated, in particular for both types of crystals installed at the CERN Large Hadron Collider for beam collimation purposes. In comparison to amorphous scattering interaction, in planar channeling this probability is ∼ 36 % for the quasi-mosaic type (planes (111)), and ∼ 27 % for the strip type (planes (110)). Moreover, the absolute inelastic nuclear interaction probability in the axial channeling orientation, along the ⟨ 110 ⟩ axis, was estimated for the first time, finding a value of 0.6 % for a crystal 2 mm long along the beam direction, with a bending angle of 55 μ rad. This value is more than two times lower with respect to the planar channeling orientation of the same crystal, and increases with the vertical angular misalignment. Finally, the correlation between the inelastic nuclear interaction probability in the planar channeling and the silicon crystal curvature is reported.
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Affiliation(s)
- W. Scandale
- CERN, European Organization for Nuclear Research, 1211 Geneva 23, Switzerland
| | - F. Andrisani
- CERN, European Organization for Nuclear Research, 1211 Geneva 23, Switzerland
| | - G. Arduini
- CERN, European Organization for Nuclear Research, 1211 Geneva 23, Switzerland
| | - F. Cerutti
- CERN, European Organization for Nuclear Research, 1211 Geneva 23, Switzerland
| | - M. Garattini
- CERN, European Organization for Nuclear Research, 1211 Geneva 23, Switzerland
- Imperial College, London, UK
| | - S. Gilardoni
- CERN, European Organization for Nuclear Research, 1211 Geneva 23, Switzerland
| | - A. Masi
- CERN, European Organization for Nuclear Research, 1211 Geneva 23, Switzerland
| | - D. Mirarchi
- CERN, European Organization for Nuclear Research, 1211 Geneva 23, Switzerland
| | - S. Montesano
- CERN, European Organization for Nuclear Research, 1211 Geneva 23, Switzerland
| | - S. Petrucci
- CERN, European Organization for Nuclear Research, 1211 Geneva 23, Switzerland
| | - S. Redaelli
- CERN, European Organization for Nuclear Research, 1211 Geneva 23, Switzerland
| | - P. Schoofs
- CERN, European Organization for Nuclear Research, 1211 Geneva 23, Switzerland
| | - R. Rossi
- CERN, European Organization for Nuclear Research, 1211 Geneva 23, Switzerland
- INFN Sezione di Roma, Piazzale Aldo Moro 2, 00185 Rome, Italy
- Dipartimento di Fisica, Sapienza Univ. Roma, Piazzale A.Moro, 2, 00185 Rome, Italy
| | - D. Breton
- Laboratoire de l’Accélérateur Linéaire (LAL), Université Paris Sud Orsay, Orsay, France
| | - D. Chaumat
- Laboratoire de l’Accélérateur Linéaire (LAL), Université Paris Sud Orsay, Orsay, France
| | - S. Dubos
- Laboratoire de l’Accélérateur Linéaire (LAL), Université Paris Sud Orsay, Orsay, France
| | - J. Maalmi
- Laboratoire de l’Accélérateur Linéaire (LAL), Université Paris Sud Orsay, Orsay, France
| | - A. Natochii
- CERN, European Organization for Nuclear Research, 1211 Geneva 23, Switzerland
- Laboratoire de l’Accélérateur Linéaire (LAL), Université Paris Sud Orsay, Orsay, France
- Taras Shevchenko National University of Kyiv (TSNUK), Kiev, Ukraine
| | - V. Puill
- Laboratoire de l’Accélérateur Linéaire (LAL), Université Paris Sud Orsay, Orsay, France
| | - A. Stocchi
- Laboratoire de l’Accélérateur Linéaire (LAL), Université Paris Sud Orsay, Orsay, France
| | - E. Bagli
- Dipartimento di Fisica e Scienze della Terra, INFN Sezione di Ferrara, Universita di Ferrara, Via Sarogat 1 Blocco C, 44121 Ferrara, Italy
| | - L. Bandiera
- Dipartimento di Fisica e Scienze della Terra, INFN Sezione di Ferrara, Universita di Ferrara, Via Sarogat 1 Blocco C, 44121 Ferrara, Italy
| | - G. Germogli
- Dipartimento di Fisica e Scienze della Terra, INFN Sezione di Ferrara, Universita di Ferrara, Via Sarogat 1 Blocco C, 44121 Ferrara, Italy
| | - V. Guidi
- Dipartimento di Fisica e Scienze della Terra, INFN Sezione di Ferrara, Universita di Ferrara, Via Sarogat 1 Blocco C, 44121 Ferrara, Italy
| | - A. Mazzolari
- Dipartimento di Fisica e Scienze della Terra, INFN Sezione di Ferrara, Universita di Ferrara, Via Sarogat 1 Blocco C, 44121 Ferrara, Italy
| | - F. Murtas
- CERN, European Organization for Nuclear Research, 1211 Geneva 23, Switzerland
- INFN, Laboratori Nazionali di Frascati, Via Fermi, 40, 00044 Frascati, Rome Italy
| | - F. Addesa
- INFN Sezione di Roma, Piazzale Aldo Moro 2, 00185 Rome, Italy
| | - G. Cavoto
- INFN Sezione di Roma, Piazzale Aldo Moro 2, 00185 Rome, Italy
- Dipartimento di Fisica, Sapienza Univ. Roma, Piazzale A.Moro, 2, 00185 Rome, Italy
| | - F. Iacoangeli
- INFN Sezione di Roma, Piazzale Aldo Moro 2, 00185 Rome, Italy
| | - F. Galluccio
- INFN Sezione di Napoli, Complesso Universitario di Monte Sant’Angelo, Via Cintia, 80126 Naples, Italy
| | - A. G. Afonin
- NRC Kurchatov Institute-IHEP, 142281 Protvino, Russia
| | | | - A. A. Durum
- NRC Kurchatov Institute-IHEP, 142281 Protvino, Russia
| | | | | | | | - A. D. Kovalenko
- Joint Institute for Nuclear Research, Joliot-Curie 6, 141980 Dubna, Russia
| | - A. M. Taratin
- Joint Institute for Nuclear Research, Joliot-Curie 6, 141980 Dubna, Russia
| | - G. I. Smirnov
- CERN, European Organization for Nuclear Research, 1211 Geneva 23, Switzerland
- Joint Institute for Nuclear Research, Joliot-Curie 6, 141980 Dubna, Russia
| | - A. S. Desinov
- Petersburg Nuclear Physics Institute in National Research Centre “Kurchatov Institute”, 188300 Gatchina, Russia
| | - Yu. A. Gavrikov
- Petersburg Nuclear Physics Institute in National Research Centre “Kurchatov Institute”, 188300 Gatchina, Russia
| | - Yu. M. Ivanov
- Petersburg Nuclear Physics Institute in National Research Centre “Kurchatov Institute”, 188300 Gatchina, Russia
| | - L. P. Lapina
- Petersburg Nuclear Physics Institute in National Research Centre “Kurchatov Institute”, 188300 Gatchina, Russia
| | - L. G. Malyarenko
- Petersburg Nuclear Physics Institute in National Research Centre “Kurchatov Institute”, 188300 Gatchina, Russia
| | - V. V. Skorobogatov
- Petersburg Nuclear Physics Institute in National Research Centre “Kurchatov Institute”, 188300 Gatchina, Russia
| | | | | | - G. Hall
- Imperial College, London, UK
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Scandale W, Vomiero A, Baricordi S, Dalpiaz P, Fiorini M, Guidi V, Mazzolari A, Della Mea G, Milan R, Ambrosi G, Zuccon P, Bertucci B, Burger W, Duranti M, Cavoto G, Santacesaria R, Valente P, Luci C, Iacoangeli F, Vallazza E, Afonin AG, Chesnokov YA, Kotov VI, Maisheev VA, Yazynin IA, Kovalenko AD, Taratin AM, Denisov AS, Gavrikov YA, Ivanov YM, Lapina LP, Malyarenko LG, Skorogobogatov VV, Suvorov VM, Vavilov SA, Bolognini D, Hasan S, Mozzanica A, Prest M. Observation of multiple volume reflection of ultrarelativistic protons by a sequence of several bent silicon crystals. Phys Rev Lett 2009; 102:084801. [PMID: 19257744 DOI: 10.1103/physrevlett.102.084801] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/02/2008] [Indexed: 05/27/2023]
Abstract
The interactions of 400 GeV protons with different sequences of bent silicon crystals have been investigated at the H8 beam line of the CERN Super Proton Synchrotron. The multiple volume reflection of the proton beam has been studied in detail on a five-crystal reflector measuring an angular beam deflection theta = 52.96 +/- 0.14 microrad. The efficiency was found larger than 80% for an angular acceptance at the reflector entrance of 70 microrad, with a maximal efficiency value of epsilon = 0.90 +/- 0.01 +/- 0.03.
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Affiliation(s)
- W Scandale
- CERN, European Organization for Nuclear Research, CH-1211 Geneva 23, Switzerland
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Scandale W, Vomiero A, Baricordi S, Dalpiaz P, Fiorini M, Guidi V, Mazzolari A, Milan R, Della Mea G, Ambrosi G, Bertucci B, Burger WJ, Duranti M, Zuccon P, Cavoto G, Iacoangeli F, Luci C, Pisano S, Santacesaria R, Valente P, Vallazza E, Afonin AG, Chesnokov YA, Kotov VI, Maisheev VA, Yazynin IA, Kovalenko AD, Taratin AM, Denisov AS, Gavrikov YA, Ivanov YM, Lapina LP, Malyarenko LG, Skorobogatov VV, Suvorov VM, Vavilov SA, Bolognini D, Hasan S, Lietti D, Mozzanica A, Prest M. Volume reflection dependence of 400 GeV/c protons on the bent crystal curvature. Phys Rev Lett 2008; 101:234801. [PMID: 19113559 DOI: 10.1103/physrevlett.101.234801] [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: 10/22/2007] [Indexed: 05/27/2023]
Abstract
The trend of volume reflection parameters (deflection angle and efficiency) in a bent (110) silicon crystal has been investigated as a function of the crystal curvature with 400 GeV/c protons on the H8 beam line at the CERN Super Proton Synchrotron. This Letter describes the analysis performed at six different curvatures showing that the optimal radius for volume reflection is approximately 10 times greater than the critical radius for channeling. A strong scattering of the beam by the planar potential is also observed for a bend radius close to the critical one.
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Affiliation(s)
- W Scandale
- CERN, European Organization for Nuclear Research, CH-1211 Geneva 23, Switzerland
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