Deﬂection of high-energy negative particles in a bent crystal through axial channeling and multiple volume reﬂection stimulated by doughnut scattering.

Scandale, W.; Vomiero, A.; Bagli, Enrico; Baricordi, Stefano; Dalpiaz, Pietro; Fiorini, Massimiliano; Guidi, Vincenzo; Mazzolari, Andrea; Vincenzi, Donato; Milan, R.; Gianantonio Della Mea,; Vallazza, E.; Afonin, A. G.; Chesnokov, Y. u. A.; Maisheev, V. A.; Yazyning, I. A.; Golovatyuk, V. M.; Kovalenko, A. D.; Taratinh, A. M.; Denisov, A. S.; Gavrikov, Y. u. A.; Ivanov, Y. u. M.; Lapina, L. P.; Malyarenko, L. G.; Skorobogatov, V. V.; Suvorov, V. M.; Vavilov, S. A.; Bolognini, D.; Hasan, S.; Prest, M.

doi:10.1016/j.physletb.2010.09.025

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Different kinds of deﬂection in a silicon crystal bent along the ⟨111⟩ axis was observedfor 150GeV/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=185μrad. 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.

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Titolo:	Deﬂection of high-energy negative particles in a bent crystal through axial channeling and multiple volume reﬂection stimulated by doughnut scattering.
Autori:	W. Scandale A. Vomiero BAGLI, Enrico BARICORDI, Stefano DALPIAZ, Pietro FIORINI, Massimiliano GUIDI, Vincenzo MAZZOLARI, Andrea VINCENZI, Donato R. Milan Gianantonio Della Mea E. Vallazza A. G. Afonin Y.u. A. Chesnokov V. A. Maisheev I. A. Yazyning V. M. Golovatyuk A. D. Kovalenko A. M. Taratinh A. S. Denisov Y.u. A. Gavrikov Y.u. M. Ivanov L. P. Lapina L. G. Malyarenko V. V. Skorobogatov V. M. Suvorov S. A. Vavilov D. Bolognini S. Hasan M. Prest mostra contributor esterni nascondi contributor esterni
Data di pubblicazione:	2010
Rivista:	PHYSICS LETTERS. SECTION B
Abstract:	Different kinds of deﬂection in a silicon crystal bent along the ⟨111⟩ axis was observedfor 150GeV/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=185μrad. 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.
Handle:	http://hdl.handle.net/11392/1404045
Appare nelle tipologie:	03.1 Articolo su rivista

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