Evaluation of Chromium Compensated Gallium Arsenide Sensors Using Photon Counting Readout Electronics

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This work summarizes the evaluation results of chromium compensated GaAs sensors manufactured by Advafab Oy and evaluated with different photon counting readout electronics. Flip chip bonded assemblies were evaluated to study the optimal sensor design and bias voltage; uniformity; sensor stability; energy resolution; charge transport properties and high X-ray flux operation. The presentation summarizes the GaAs performance results received from the contributing authors. It presents analytical comparisons to the formerly commercially available GaAs sensor material in terms of uniformity and spectral resolution and high flux operation. Advafab’s GaAs presents better uniformity, similar energy resolution and superior high flux tolerance. Furthermore, the presentation covers the latest development efforts to reduce the leakage current of the GaAs sensors by using new types of anode and cathode contacts. The presentation concludes that it is possible to manufacture radiation sensors of chromium compensated GaAs with high uniformity and a good energy resolution that can operate at high X-ray fluxes.

Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.