Beam Induced Fluorescence monitor for high-intensity beams
High-Luminosity LHC (HL-LHC) upgrade will lead to a significant increase in beam intensity. Therefore, beam halo must be constantly cleared due to high energy stored. During HL-LHC a new collimation step, a system called Hollow Electron Lens (HEL), will be added which uses a hollow electron beam passing concentrically around the LHC beam over approximately 3m of the beamline.
A Gas Jet Monitor (link to the QUASAR project Gas Jet Monitor) is being developed at CI for monitoring the concentricity and profiles of these two beams during operation at LHC. This instrument images the beams using fluorescence photons generated by the interaction between the beams and thin gas curtain.
This project aims to improve the data processing of the monitor including machine learning techniques. One possible case is a reconstruction of a beam image distortion due to beam space-charge using neural networks. This project also includes data analysis, simulations, and measurements of fluorescence cross-section and beam profiles at LHC and Hollow Electron Lens test stand at CERN.