A high performance apparatus has been designed and built by the H8-RD22 collaboration for the study of channeling and volume reflection phenomena in the interaction of 400 GeV/c protons with bent silicon crystals, during the 2006 data taking in the external beamline H8 of the CERN SPS. High-quality silicon short crystals were bent by either anticlastic or quasimosaic effects. Alignment with the highly parallel (8 mu rad divergence) proton beam was guaranteed through a submicroradian goniometric system equipped with both rotational and translational stages. Particle tracking was possible by a series of silicon microstrip detectors with high-resolution and a parallel plate gas chamber, triggered by various scintillating detectors located along the beamline. Experimental observation of volume reflection with 400 GeV/c protons proved true with a deflection angle of (10.4 +/- 0.5) mu rad with respect to the unperturbed beam, with a silicon crystal whose (111) planes were parallel to the beam.

Apparatus to study crystal channeling and volume reflection phenomena at the SPSH8 beamline

PREST, MICHELA
2008

Abstract

A high performance apparatus has been designed and built by the H8-RD22 collaboration for the study of channeling and volume reflection phenomena in the interaction of 400 GeV/c protons with bent silicon crystals, during the 2006 data taking in the external beamline H8 of the CERN SPS. High-quality silicon short crystals were bent by either anticlastic or quasimosaic effects. Alignment with the highly parallel (8 mu rad divergence) proton beam was guaranteed through a submicroradian goniometric system equipped with both rotational and translational stages. Particle tracking was possible by a series of silicon microstrip detectors with high-resolution and a parallel plate gas chamber, triggered by various scintillating detectors located along the beamline. Experimental observation of volume reflection with 400 GeV/c protons proved true with a deflection angle of (10.4 +/- 0.5) mu rad with respect to the unperturbed beam, with a silicon crystal whose (111) planes were parallel to the beam.
http://scitation.aip.org/content/aip/journal/rsi/79/2/10.1063/1.2832638
Bent crystal; collimation; tracking
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11383/13013
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