25–30 Sept 2016
Europe/Rome timezone
deadline for abstracts has expired

Experimental study of coherent interaction at high-energy in the presence of crystalline defects

26 Sept 2016, 18:40
1h

Speaker

Enrico Bagli (FE)

Description

The presence of structural defects in a crystal strongly affects the orientational coherent effects of high-energy charged particles. Indeed, the trajectories of charged particles may be abruptly modified by a dislocation or a stacking-fault, causing the particle to dechannel. Two strips, a bent SiGe strip and a bent lithium niobate strip, were exposed to a 400 GeV/c proton beam at the external linesof CERN Super Proton Synchrotron to study the dependence of coherent interactions on crystalline defects. In spite of low channeling efficiency, the volume reflection maintains a high deflection efficiency for both the crystals. In order to have an insight into the role of dislocations on channeling and volume reflection, computer simulation via DYNECHARM++ Monte Carlo code were worked out. The results of the simulations agree with experimental records, demonstrating that volume reflection is more robust than channeling in the presence of dislocations.

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