GaAs detector performance and radiation hardness

Developments in GaAs microstrip and pixel detectors are described and their radiation hardness to neutron, proton and gamma radiation doses compared with those expected at the Large Hadron Collider (LHC). While the resistance to neutron and gamma-ray irradiation is satisfactory, GaAs Schottky diode detectors on semi-insulating substrates are found to be more susceptible than silicon detectors to proton-induced damage.