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| VOLUME 101 (2015) | ISSUE 10 | PAGE 755 |
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Comparative results on the deflection of positively and negatively charged particles by multiple volume reflections in a multi-strip silicon deflector
W. Scandalea,b,e, G. Arduinia, M. Butchera, F. Ceruttia, M. Garattinia, S. Gilardonia, A. Lechnera, R. Lositoa, A. Masia, A. Mereghettia, E. Metrala, D. Mirarchia,j, S. Montesanoa, S. Redaellia, R. Rossia,e, P. Schoofsa, G. Smirnova, E. Baglic, L. Bandierac, S. Baricordic, P. Dalpiazc, G. Germoglic, V. Guidic, A. Mazzolaric, D. Vincenzic, G. Clapsd, S. Dabagovd,k,l, D. Hampaid, F. Murtasd, G. Cavotoe, F. Iacoangelie, L. Ludovicie, R. Santacesariae, P. Valentee, F. Gallucciof, A. G. Afoning, Yu. A. Chesnokovg, A. A. Durumg, V. A. Maisheevg, Yu. E. Sandomirskiyg, A. A. Yanovichg, A. D. Kovalenkoh, A. M. Taratinh, Yu. A. Gavrikovi, Yu. M. Ivanovi, L. P. Lapinai, W. Fergusonj, J. Fulcherj, G. Hallj, M. Pesaresij, M. Raymondj, D. Bologninim,n, S. Hasanm,n, M. Prestm,n, E. Vallazzao
aCERN, European Organization for Nuclear Research, CH-1211 Geneva 23, Switzerland bLaboratoire de l'Accelerateur Lineaire (LAL), Universite Paris Sud Orsay, 91898 Orsay France cINFN Sezione di Ferrara, Dipartimento di Fisica, Universita` di Ferrara, 44122 Ferrara, Italy dINFN LNF, 40 00044 Frascati (Roma), Italy eINFN Sezione di Roma, 00185 Rome, Italy fINFN Sezione di Napoli, 80126 Napoli, Italy gInstitute of High Energy Physics, RU-142284 Protvino, Russia hJoint Institute for Nuclear Research, 141980, Dubna, Russia iPetersburg Nuclear Physics Institute, 188300 Gatchina, Russia jImperial College, London, United Kingdom kLebedev Physical Institute of the RAS, 119991 Moscow, Russia lNational Research Nuclear University "MEPhI", 119991 Moscow, Russia mUniversita` dell'Insubria, 22100 Como, Italy nINFN Sezione di Milano Bicocca, 20126 Milano, Italy oINFN Sezione di Trieste, 34127 Trieste, Italy
Abstract
Bent silicon crystals in channeling mode are already used for beam extraction and collimation in particle accelerators. Volume reflection of beam particles is more efficient than beam channeling; however the mean deflection angle is rather small. An experiment on the deflection of a 400 GeV/c proton beam and a 150 GeV/c π- beam at CERN using a multi-strip silicon deflector in reflection mode is described. The mean deflection angle of beam particles has been considerably increased due to sequential volume reflections realized in the deflector. This gives possibility for a successful usage of the multi-strip deflectors for beam collimation in high energy accelerators. |