Channeling in a short bent siliconcrystal was investigated at the CERN SPS using 400-GeV/c protons with anangular spread much narrower than the critical channeling angle. Particle dechanneling due to multiple scattering on the atomic nuclei of the crystal was observed and its dechanneling length was measured to be about 1.5mm. For a crystal with length comparable to such dechanneling length, an efficiencyof 83.4%was recorded, which is close to the maximum value expected for a parallel beam and exceeds the previously known limitation of deflection efficiency for long crystals.
Observation of nuclear dechanneling for high-energy protons in crystals
BARICORDI, Stefano;DALPIAZ, Pietro;FIORINI, Massimiliano;GUIDI, Vincenzo;MAZZOLARI, Andrea;
2009
Abstract
Channeling in a short bent siliconcrystal was investigated at the CERN SPS using 400-GeV/c protons with anangular spread much narrower than the critical channeling angle. Particle dechanneling due to multiple scattering on the atomic nuclei of the crystal was observed and its dechanneling length was measured to be about 1.5mm. For a crystal with length comparable to such dechanneling length, an efficiencyof 83.4%was recorded, which is close to the maximum value expected for a parallel beam and exceeds the previously known limitation of deflection efficiency for long crystals.File in questo prodotto:
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