Speaker
Dr
Alexander Taratin
(Joint Institute for Nuclear Research)
Description
The ordered positions of atoms in crystals give a reason to study multiple scattering of high energy charged particles within them. In addition, the accurate representation of multiple scattering of high-energy protons in a bent crystal is important for studies of crystal assisted collimation at the SPS and the LHC. Multiple scattering of 400 GeV/c protons in bent silicon crystals was measured for orientations far from the directions of main crystallographic planes and axes in conditions excluding channeling of protons. The observed RMS deflections are a little larger than those obtained from the Moliere theory. Simulation of multiple scattering in a model of binary collisions with the crystal atoms shows about 3.5% decrease of the RMS deflection with respect to the model of a sequence of random collisions. This is a possible indication on a reduction of multiple scattering of protons in a crystal in comparison with its amorphous state. The experimental results reported were obtained in the frame of UA9 experiment in CERN.
Primary author
Dr
Alexander Taratin
(Joint Institute for Nuclear Research)
Co-author
Dr
Walter Scandale
(ROMA1)
