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Space charge formation in chromium compensated GaAs radiation detectors

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Pubblicato in:arXiv.org (Apr 3, 2020), p. n/a
Autore principale: Belas, E
Altri autori: Grill, R, Pipek, J, Praus, P, Bok, J, Musiienko, A, Moravec, P, Tolbanov, O, Tyazhev, A, Zarubin, A
Pubblicazione:
Cornell University Library, arXiv.org
Soggetti:
Simulation
Bias
Pulsed current
Space charge
Transient current
Hole conductivity
Computer simulation
Radiation detectors
Chromium
Monte Carlo simulation
Accesso online:Citation/Abstract
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Abstract:Space charge formation in chromium-compensated GaAs sensors is investigated by the laser-induced transient current technique applying pulsed and DC bias. Formation of non-standard space charge manifested by an appearance of both negatively and positively charged regions in DC biased sensors was revealed during 5 ms after switching bias. Using Monte Carlo simulations of current transients we determined enhanced electron lifetime {\tau} = 150 ns and electron drift mobility {\mu}d = 3650 cm2/Vs. We developed and successfully applied theoretical model based on fast hole trapping in the system with spatially variable hole conductivity.
ISSN:2331-8422
Fonte:Engineering Database