Study of Beam Loss Monitors (BLM) in Storage Ring

TL;DR

This study evaluates different beam loss monitor technologies in a storage ring, focusing on electron losses, secondary particle production, and detector performance using simulations to optimize beam loss detection.

Contribution

It compares ionization chamber, NaI, and Si detectors for beam loss monitoring and selects Si detectors for detailed analysis with simulation-based calculations.

Findings

Si detector is suitable for beam loss detection in storage rings

Electron deflection angles due to magnetic field mismatches are quantified

Photon and secondary particle production are simulated and reported

Abstract

The Beam Loss Monitors (BLM) are designed to measure the position and amount of beam loss in accelerators. In this article, we have studied the 3 GeV electron losses in the storage ring and secondary particles from the losses on the beam pipe. We have compared ionization chamber, NaI and Si radiation detectors as BLM and selected Si detector for further studies. We have calculated electron deflection angle due to magnetic field mismatches in dipole magnets, quadrupoles and sextupoles and assumed that electron beam is deflected and hit the beam pipe with the angle of 3 degrees with respect to the beam axis. The number and energy of photons and secondary particles on beam pipe and in Si detector are calculated by the MCNP code and reported in this paper.