Volume reflection of a proton beam in a bent crystal

Document identifier: oai:DiVA.org:ltu-7654
Access full text here:10.1103/PhysRevLett.97.144801
Keyword: Natural Sciences, Physical Sciences, Other Physics Topics, Naturvetenskap, Fysik, Annan fysik, Experimentell fysik, Experimental Physics
Publication year: 2006
Abstract:

Volume reflection predicted in the mid-1980s by Taratin and Vorobiev has been observed for the first time in the interactions of a 70 GeV proton beam with a short bent crystal. Incident protons deviate from convex atomic planes in the bulk of the crystal as a result of coherent interaction with bent lattice around the tangency point of particle trajectory with a curved atomic plane. The deflection angle 2Î R was found to be (39.5±2.0) Î rad, or (1.65±0.08)Î c in terms of the critical angle for channeling. The process has a large probability with respect to channeling and takes place in the angular range equal to the bend angle of atomic planes. It could possibly open new fields of application of crystals in high-energy particle beam optics. © 2006 The American Physical Society.

Authors

Yu M. Ivanov

Petersburg Nuclear Physics Institute
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A. A. Petrunin

Petersburg Nuclear Physics Institute
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V. V. Skorobogatov

Petersburg Nuclear Physics Institute
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Yu A. Gavrikov

Petersburg Nuclear Physics Institute
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A. V. Gelamkov

Petersburg Nuclear Physics Institute
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L. P. Lapina

Petersburg Nuclear Physics Institute
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A. I. Schetkovsky

Petersburg Nuclear Physics Institute
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S. A. Vavilov

Petersburg Nuclear Physics Institute
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V. I. Baranov

Institute of High Energy Physics - Moscow Region
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Yu A. Chesnokov

Institute of High Energy Physics - Moscow Region
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A. G. Afonin

Institute of High Energy Physics - Moscow Region
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V. T. Baranov

Institute of High Energy Physics - Moscow Region
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V. N. Chepegin

Institute of High Energy Physics - Moscow Region
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V. Guidi

Dipartimento di Fisica Sperimentale, Università di Torino
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W. Scandale

European Organization for Nuclear Research
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Alberto Vomiero

Laboratori Nazionali di Legnaro
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