Title:	Detector response and performance of a 500 μm thick GaAs attached to Timepix3 in relativistic particle beams
Authors:	Bergmann, Benedikt, Ludwig Azzarello, Philipp Broulím, Pavel Burian, Petr Meduna, Lukáš Paniccia, Mercedes Perrina, Chiara Pospíšil, Stanislav Tlustos, Lukáš Wu, X.
Citation:	BERGMANN, B. L., AZZARELLO, P., BROULÍM, P., BURIAN, P., MEDUNA, L., PANICCIA, M., PERRINA, C. H., POSPÍŠIL, S., TLUSTOS, L., WU, X. Detector response and performance of a 500 μm thick GaAs attached to Timepix3 in relativistic particle beams. Journal of Instrumentation, 2020, roč. 15, č. 3, s. 0-13. ISSN 1748-0221.
Issue Date:	2020
Publisher:	Institute of Physics Publishing
Document type:	článek article
URI:	2-s2.0-85084192611 http://hdl.handle.net/11025/42487
ISSN:	1748-0221
Keywords in different language:	dE/dx detectors;materials for solid-state detectors;particle tracking detectors;solidstate detectors
Abstract in different language:	The performance and response of a Timepix3 detector with a 500 μm thick GaAs:Cr sensor layer was investigated in different radiation fields. The sensor resistivity was ρ 109 Ω cm. Fitting different modified Hecht functions, which take the small pixel effect into account, the mobility-lifetime products of μeτe = (0.773 ± 0.018) × 10-4 cm2V-1 and μeτe = (0.996 ± 0.056) × 10-4 cm2V-1 were determined. Hereby, the latter value is favored due to the better agreement of fit and data. In a measurement in a 40 GeV/c pion beam, the drift times and charge collection efficiencies were studied as a function of the interaction depth. We present the measured drift velocity as a function of the electric field strength and compare the determined dependence with a model. In a measurement in a mixed ion beam, we study the capability of the detector to separate different ion species. We show the detector response in the form of tracks and discuss heavy ion track features. © 2020 IOP Publishing Ltd and Sissa Medialab.
Rights:	Plný text je přístupný v rámci univerzity přihlášeným uživatelům. © Institute of Physics Publishing
Appears in Collections:	Články / Articles (KAE) Články / Articles (RICE) OBD

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