Channeling and radiation experiments at SLAC

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS

卷:402

Article; Proceedings Paper

Wienands, U.¹  Gessner, S.²  Hogan, M. J.²  Markiewicz, T. W.²  Smith, T.²  Sheppard, J.²  Uggerhoj, U. I.³  Hansen, J. L.³  Wistisen, T. N.³  Bagli, E.^4,5  Bandiera, L.^4,5  Germogli, G.^4,5  Mazzolari, A.^4,5  Guidi, V.^4,5  Sytov, A.^4,5  Holtzapple, R. L.⁶  McArdle, K.⁶  Tucker, S.⁶  Benson, B.⁷ 

[1] Argonne Natl Lab, 9700 South Cass Rd, Argonne, IL 60436 USA

[2] SLAC Natl Lab, 2575 Sand Hill Rd, Menlo Pk, CA 94025 USA

[3] Aarhus Univ, Dept Phys & Astron, Ny Munkegade 120, DK-8000 Aarhus, Denmark

[4] Univ Ferrara, Dept Phys & Earth Sci, Via Saragat 1-C, I-44122 Ferrara, Italy

[5] INFN, Sect Ferrara, Via Saragat 1-C, I-44122 Ferrara, Italy

[6] Calif Polytech State Univ San Luis Obispo, San Luis Obispo, CA 93407 USA

[7] MIT, 77 Massachusetts Ave, Cambridge, MA 02139 USA

关键词: Crystal;    Channeling;    Radiation;    Undulator;    Volume reflection;   

DOI  :  10.1016/j.nimb.2017.03.097

来源: Elsevier

【 摘 要 】

Over the last years, a SLAC-Aarhus-Ferrara-CalPoly collaboration (augmented by members of ANL and MIT) has performed channeling experiments using bent silicon crystals at the SLAC End Station A Test Beam as well as the FACET accelerator test facility. These experiments have revealed a remarkable channeling efficiency of about 24% under our conditions, as well as shown the dechanneling rate to be independent of the beam energy; an unexpected result. Volume reflection appears to be even more efficient with almost the whole beam taking,part in the reflection process. In our most recent experiment we have attempted to measure the spectrum of channeling and volume-reflection gamma radiation. The goal of this series of experiments is to develop a crystalline undulator capable of producing narrow-band gamma rays with electron beams. Such a device could have applications in gamma-ray radiography as well as spectroscopic applications. (C) 2017 Elsevier B.V. All rights reserved.

【 授权许可】

Free