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Deflection of high-energy negative particles in a bent crystal through axial channeling and multiple volume reflection stimulated by doughnut scattering
CERN.
INFM-CNR Sensor Lab.ORCID iD: 0000-0003-2935-1165
INFN Sezione di Ferrara.
INFN Sezione di Ferrara.
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Number of Authors: 302010 (English)In: Physics Letters B, ISSN 0370-2693, E-ISSN 1873-2445, Vol. 693, no 5, p. 545-550Article in journal (Refereed) Published
Abstract [en]

Different kinds of deflection in a silicon crystal bent along the 〈111〉 axis was observed for 150 GeV/. c negative particles, mainly π- mesons, at one of the secondary beams of the CERN SPS. The whole beam was deflected to one side in quasi-bound states of doughnut scattering (DSB) by atomic strings with the efficiency (95.4 ± 0.2)% and with the peak position close to the bend crystal angle, α=185 μrad. It was observed volume capture of π- mesons into the DSB states with a probability higher than 7%. A beam deflection opposite to the crystal bend was observed for some orientations of the crystal axis due to doughnut scattering and subsequent multiple volume reflections of π- mesons by different bent planes crossing the axis. © 2010 Elsevier B.V.

Place, publisher, year, edition, pages
2010. Vol. 693, no 5, p. 545-550
Keywords [en]
Beam, Channeling, Crystal, Deflection, Volume reflection
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Other Physics Topics
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Experimental Physics
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URN: urn:nbn:se:ltu:diva-10224DOI: 10.1016/j.physletb.2010.09.025Scopus ID: 2-s2.0-77957295322Local ID: 8fc670a9-5676-4a7c-bb8c-617974cfefd2OAI: oai:DiVA.org:ltu-10224DiVA, id: diva2:983164
Note

Upprättat; 2010; 20141211 (albvom)

Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2019-08-16Bibliographically approved

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Vomiero, Alberto

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