Simulation of electron beam transport within hollow electron lens using warp and development of calibration method for beam loss monitors

The High Luminosity LHC aims to double the stored beam energy up to 700 MJ which challenges its collimation system and consequent beam losses measurements to new, greater performances. This thesis describes a proposed new stage of LHC collimation system, the Hollow Electron Lens (HEL) and a radiation-hard Diamond Beam Loss Monitors (dBLMs). The practical part of the work discusses relative calibration of the dBLMs response to LHC25ns like bunch train. A measurement was carried out to relatively calibrate the analog and digital chain of every dBLM at LHC in order to provide users with a rough measure of the relative beam losses. Calibration coefficients for the dBLM intallations were calculated and readied for use in the control system. Further, a hollow electron beam was simulated in the first part of HEL using Warp code. The trajectory of the beam was found to be stable, with a beam offset of ≈ 1.5 mm after a bend, agreeing with the CST simulations. Mesh bending was studied and found to introduce no artifacts in the trajectory or the beam profile.