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.
Primary author
Enrico Bagli
(FE)
Co-authors
Prof.
Alberto Carnera
(Universitá di Padova)
Alessandro Berra
(MIB)
Alexei Sytov
(FE)
Andrea Mazzolari
(FE)
Daniela Lietti
(M)
Davide Bolognini
(INFN)
Davide De Salvador
(LNL)
Erik Silvio Vallazza
(TS)
Giacomo Germogli
(FE)
Gianluigi Maggioni
(LNL)
LAURA BANDIERA
(FE)
Dr
Marco Bazzan
(Universitá di Padova)
Michela Prest
(MIB)
Nicola Argiolas
(LNL)
Vincenzo Guidi
(FE)
