2011/09/23 by Tikhomirov, Victor V., Alexei Sytov, Sytov, Alexei I.
Physics and Astronomy · #Accelerator Physics (physics.acc-ph) #Crystallography and Radiation Phenomena #FOS: Physical sciences #High-Energy Particle Collisions Research #Instrumentation and Detectors (physics.ins-det) #Particle physics theoretical and experimental studies
paper · pdf · doi:10.48550/arxiv.1109.5051
openalex publication_date 2011/09/23 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/04
The paper concerns the crystal based collimation suggested to upgrade the Large Hadron Collider collimation system. The issue of collimation efficiency dependence on the muscut angle characterizing nonparallelity of the channeling planes and crystal surface is mainly addressed. It is shown for the first time that even the preferable positive miscut could severely deteriorate the channeling collimation efficiency in the crystal collimation UA9 experiment. We demonstrate that the positive miscut influence can increase the nuclear reaction rate in the perfectly aligned crystal collimator by a factor of 4.5. We also discuss the possible miscut influence on the future LHC crystal collimation system performance as well as suggest simple estimates for the beam diffusion step, average impact parameter of particle collisions with the collimator and angular divergence of the colliding particle beam portion.