Radiation studies for GaAs in the ATLAS Inner Detector

TL;DR

This paper estimates radiation effects on GaAs detectors in the ATLAS Inner Detector, predicting their degradation over years of LHC operation based on expected hadron fluences and hardness factors.

Contribution

It provides the first detailed estimation of radiation hardness and degradation of GaAs detectors in the ATLAS Inner Detector environment.

Findings

Calculated hardness factors and neutron fluences for GaAs detector positions.

Predicted detector degradation over multiple years of LHC operation.

Assessed the suitability of different GaAs substrates under radiation exposure.

Abstract

We estimate the hardness factors and the equivalent 1 MeV neutron fluences for hadrons fluences expected at the GaAs positions wheels in the ATLAS Inner Detector. On this basis the degradation of the GaAs particle detectors made from different substrates as a function of years LHC operation is predicted.