2. Particle Physics (CSN1)

Gas detectors: general principles

by Rob Veenhof (RD51)

Aula Salvini (LNF INFN)

Aula Salvini


Gas-based detectors measure the trajectories of charged particles through the ionisation electrons that are deposited in the gas. An electric field, and sometimes a magnetic field, guide(s) these electrons to amplification structures where an avalanche occurs. Avalanches produce electrons and ions and it is their motion that generates electric signals on the read-out electrodes. In this presentation we review these mechanisms.