A Systematic Investigation of Beam Losses and Position-Reconstruction Techniques Measured with a Novel oBLM at CLEAR

A Systematic Investigation of Beam Losses and Position-Reconstruction Techniques Measured with a Novel oBLM at CLEAR

Blog Article

Optical Beam-Loss Monitors (oBLMs) allow for cost-efficient and spatially continuous measurements of beam losses at accelerator facilities.A standard oBLM consists of several tens of metres of optical fibre aligned parallel to a beamline, coupled to photosensors at either or both ends.Using the timing information from loss signals, the loss Gel Top positions can be reconstructed.

This paper presents a novel oBLM system recently deployed at the CERN Linear Electron Accelerator for Research (CLEAR).Multiple methods of extracting timing and position information from measured waveforms with silicon photomultipliers (SiPM) Hydro 4 Parts and photomultiplier tubes (PMT) are investigated.For this installation, the optimal approach is determined to be applying a constant fraction discrimination (CFD) on the upstream readout.

The position resolution is found to be similar for the tested SiPM and PMT.This work has resulted in the development of a user interface to aid operations by visualising the beam losses and their positions in real time.