title: Observation of deflection of a beam of multi-GeV electrons by a thin crystal.
abstract: We report on an experiment performing channeling and volume reflection of a high-energy electron beam using a quasimosaic, bent silicon (111) crystal at the End Station A Test Beam at SLAC. The experiment uses beams of 3.35 and 6.3 GeV. In the channeling orientation, deflections of the beam of 400 μrad for both energies with about 22% efficiency are observed, while in the volume-reflection orientation, deflection of the beam by 120 μrad at 3.35 GeV and by 80 μrad at 6.3 GeV is observed with 86%-95% efficiency. Quantitative measurements of the channeling efficiency, surface transmission, and dechanneling length are taken. These are the first quantitative measurements of channeling and volume reflection using a primary beam of multi-GeV electrons.
authors.affiliation: SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA.
authors.forename: U
authors.initials: U
authors.lastname: Wienands
authors.affiliation: SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA.
authors.forename: T W
authors.initials: TW
authors.lastname: Markiewicz
authors.affiliation: SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA.
authors.forename: J
authors.initials: J
authors.lastname: Nelson
authors.affiliation: SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA.
authors.forename: R J
authors.initials: RJ
authors.lastname: Noble
authors.affiliation: SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA.
authors.forename: J L
authors.initials: JL
authors.lastname: Turner
authors.affiliation: Department of Physics and Astronomy, University of Aarhus, Ny Munkegade 120, DK-8000 Aarhus, Denmark.
authors.forename: U I
authors.initials: UI
authors.lastname: Uggerhøj
authors.affiliation: Department of Physics and Astronomy, University of Aarhus, Ny Munkegade 120, DK-8000 Aarhus, Denmark.
authors.forename: T N
authors.initials: TN
authors.lastname: Wistisen
authors.affiliation: Department of Physics and Earth Sciences of the University of Ferrara, and INFN Section of Ferrara, Via Saragat 1/C, I-44122 Ferrara, Italy.
authors.forename: E
authors.initials: E
authors.lastname: Bagli
authors.affiliation: Department of Physics and Earth Sciences of the University of Ferrara, and INFN Section of Ferrara, Via Saragat 1/C, I-44122 Ferrara, Italy.
authors.forename: L
authors.initials: L
authors.lastname: Bandiera
authors.affiliation: Department of Physics and Earth Sciences of the University of Ferrara, and INFN Section of Ferrara, Via Saragat 1/C, I-44122 Ferrara, Italy.
authors.forename: G
authors.initials: G
authors.lastname: Germogli
authors.affiliation: Department of Physics and Earth Sciences of the University of Ferrara, and INFN Section of Ferrara, Via Saragat 1/C, I-44122 Ferrara, Italy.
authors.forename: V
authors.initials: V
authors.lastname: Guidi
authors.affiliation: Department of Physics and Earth Sciences of the University of Ferrara, and INFN Section of Ferrara, Via Saragat 1/C, I-44122 Ferrara, Italy.
authors.forename: A
authors.initials: A
authors.lastname: Mazzolari
authors.affiliation: California Polytechnic State University, San Luis Obispo, California 93407, USA.
authors.forename: R
authors.initials: R
authors.lastname: Holtzapple
authors.affiliation: California Polytechnic State University, San Luis Obispo, California 93407, USA.
authors.forename: M
authors.initials: M
authors.lastname: Miller