CERN Accelerating science

Article
Title Observation of multiple volume reflection by different planes in one bent silicon crystal for high-energy negative particles
Author(s) Scandale, W (CERN) ; Vomiero, A (INFM, Brescia) ; Bagli, E (Ferrara U. ; INFN, Ferrara) ; Baricordi, S (Ferrara U. ; INFN, Ferrara) ; Dalpiaz, P (Ferrara U. ; INFN, Ferrara) ; Fiorini, M (Ferrara U. ; INFN, Ferrara) ; Guidi, V (Ferrara U. ; INFN, Ferrara) ; Mazzolari, A (Ferrara U. ; INFN, Ferrara) ; Vincenzi, D (Ferrara U. ; INFN, Ferrara) ; Milan, R (INFN, Legnaro) ; Della Mea, G (Trento U.) ; Vallazza, E (INFN, Trieste) ; Afonin, A G (Serpukhov, IHEP) ; Chesnokov, Yu A (Serpukhov, IHEP) ; Maisheev, V (Serpukhov, IHEP) ; Yazynin, I A (Serpukhov, IHEP) ; Kovalenko, A (Dubna, JINR) ; Taratin, A M (Dubna, JINR) ; Denisov, A (St. Petersburg, INP) ; Gavrikov, Yu A (St. Petersburg, INP) ; Ivanov, Yu M (St. Petersburg, INP) ; Lapina, L P (St. Petersburg, INP) ; Malyarenko, L G (St. Petersburg, INP) ; Skorobogatov, V V (St. Petersburg, INP) ; Suvorov, V M (St. Petersburg, INP) ; Vavilov, S A (St. Petersburg, INP) ; Bolognini, D (INFN, Milan Bicocca ; Insubria U., Como) ; Hasan, S (INFN, Milan Bicocca ; Insubria U., Como) ; Mattera, A (INFN, Milan Bicocca ; Insubria U., Como) ; Prest, M. (INFN, Milan Bicocca ; Insubria U., Como) ; Tikhomirov, V V (Minsk, Inst. Nucl. Problems)
Publication 2011
In: Europhys. Lett 93 (2011) 56002
DOI 10.1209/0295-5075/93/56002
Subject category Particle Physics - Experiment
Abstract Multiple volume reflection by different planes passing through the < 111 > axis in a bent silicon crystal was observed for the first time for 150 GeV/c negative particles, pi(-) mesons, at one of the secondary beams of the CERN SPS. The beam of pi(-) mesons was deflected opposite to the crystal bend by an angle of about 48 mu rad, which is 4.6 times larger than in a single volume reflection by the (110) bent planes. The one-side deflection efficiency was about 65\%. Multiple volume reflection transforms to a single volume reflection when the orientation angle of the < 111 > axis relative to the beam direction is increased. Copyright (c) EPLA, 2011

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