Detector response and performance of a 500 μm thick GaAs attached to Timepix3 in relativistic particle beams

被引：5
|
作者：
Bergmann, B. [1 ]
Azzarello, P. [3 ]
Broulim, P. [2 ]
Burian, P. [1 ,2 ]
Meduna, L. [1 ]
Paniccia, M. [3 ]
Perrina, C. [3 ]
Pospisil, S. [1 ]
Tlustos, L. [1 ]
Wu, X. [3 ]
机构：
[1] Czech Tech Univ, Inst Expt & Appl Phys, Husova 240-5, Prague 11000 1, Czech Republic
[2] Univ West Bohemia, Fac Elect Engn, Plzen, Czech Republic
[3] Univ Geneva, Dept Phys Nucl & Corpusculaire, Geneva, Switzerland
来源：
JOURNAL OF INSTRUMENTATION | 2020年 / 15卷 / 03期
关键词：
dE/dx detectors; Materials for solid-state detectors; Particle tracking detectors (Solid-state detectors);
D O I：
10.1088/1748-0221/15/03/C03013
中图分类号：
TH7 [仪器、仪表];
学科分类号：
0804 ; 080401 ; 081102 ;
摘要：
The performance and response of a Timepix3 detector with a 500 mu m thick GaAs:Cr sensor layer was investigated in different radiation fields. The sensor resistivity was rho approximate to 10(9) Omega cm. Fitting different modified Hecht functions, which take the small pixel effect into account, the mobility-lifetime products of mu(e)tau(e) = (0.773 +/- 0.018 degrees) x 10-4 cm(2)V(-1) and mu(e)tau(e) = (0.996 +/- 0.056) x 10(-4) cm(2)V(-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.
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页数：14
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