title: High-efficiency deflection of high-energy protons through axial channeling in a bent crystal.
abstract: Beam deflection due to axial channeling in a silicon crystal bent along the 111 axis was observed with 400 GeV/c protons at the CERN Super Proton Synchrotron. The condition for doughnut scattering of protons by the atomic strings of the crystal was attained. Such a condition allowed one to observe a beam deflection of 50 murad with about 30% efficiency. The contribution of hyperchanneled states of protons to the observed beam deflection was less than 2% according to simulation results.
authors.affiliation: CERN, European Organization for Nuclear Research, Geneva 23, Switzerland.
authors.forename: Walter
authors.initials: W
authors.lastname: Scandale
authors.forename: Alberto
authors.initials: A
authors.lastname: Vomiero
authors.forename: Stefano
authors.initials: S
authors.lastname: Baricordi
authors.forename: Pietro
authors.initials: P
authors.lastname: Dalpiaz
authors.forename: Massimiliano
authors.initials: M
authors.lastname: Fiorini
authors.forename: Vincenzo
authors.initials: V
authors.lastname: Guidi
authors.forename: Andrea
authors.initials: A
authors.lastname: Mazzolari
authors.forename: Gianantonio
authors.initials: G
authors.lastname: Della Mea
authors.forename: Riccardo
authors.initials: R
authors.lastname: Milan
authors.forename: Giovanni
authors.initials: G
authors.lastname: Ambrosi
authors.forename: Bruna
authors.initials: B
authors.lastname: Bertucci
authors.forename: William J
authors.initials: WJ
authors.lastname: Burger
authors.forename: Paolo
authors.initials: P
authors.lastname: Zuccon
authors.forename: Gianluca
authors.initials: G
authors.lastname: Cavoto
authors.forename: Claudio
authors.initials: C
authors.lastname: Luci
authors.forename: Roberta
authors.initials: R
authors.lastname: Santacesaria
authors.forename: Paolo
authors.initials: P
authors.lastname: Valente
authors.forename: Erik
authors.initials: E
authors.lastname: Vallazza
authors.forename: Alexander G
authors.initials: AG
authors.lastname: Afonin
authors.forename: Yury A
authors.initials: YA
authors.lastname: Chesnokov
authors.forename: Vladimir A
authors.initials: VA
authors.lastname: Maisheev
authors.forename: Igor A
authors.initials: IA
authors.lastname: Yazynin
authors.forename: Alexander D
authors.initials: AD
authors.lastname: Kovalenko
authors.forename: Alexander M
authors.initials: AM
authors.lastname: Taratin
authors.forename: Alexander S
authors.initials: AS
authors.lastname: Denisov
authors.forename: Yury A
authors.initials: YA
authors.lastname: Gavrikov
authors.forename: Yuri M
authors.initials: YM
authors.lastname: Ivanov
authors.forename: Lyubov P
authors.initials: LP
authors.lastname: Lapina
authors.forename: Liudmila G
authors.initials: LG
authors.lastname: Malyarenko
authors.forename: Vyacheslav V
authors.initials: VV
authors.lastname: Skorobogatov
authors.forename: Vsevolod M
authors.initials: VM
authors.lastname: Suvorov
authors.forename: Sergey A
authors.initials: SA
authors.lastname: Vavilov
authors.forename: Davide
authors.initials: D
authors.lastname: Bolognini
authors.forename: Said
authors.initials: S
authors.lastname: Hasan
authors.forename: Aldo
authors.initials: A
authors.lastname: Mozzanica
authors.forename: Michela
authors.initials: M
authors.lastname: Prest