Properties of GaAs:Cr-based Timepix detectors

被引：18
|
作者：
Smolyanskiy, P. [1 ,2 ]
Bergmann, B. [3 ]
Chelkov, G. [1 ]
Kotov, S. [1 ]
Kruchonak, U. [1 ]
Kozhevnikov, D. [1 ]
Sierra, Y. Mora [3 ]
Stekl, I. [3 ]
Zhemchugov, A. [1 ]
机构：
[1] Joint Inst Nucl Res, Dubna, Russia
[2] Saratov NG Chernyshevskii State Univ, Saratov, Russia
[3] Inst Expt & Appl Phys Prague, Prague, Czech Republic
来源：
JOURNAL OF INSTRUMENTATION | 2018年 / 13卷
关键词：
Materials for solid-state detectors; Hybrid detectors; X-ray detectors; X-RAY; PIXEL DETECTORS; IMAGING DETECTORS; SENSOR; CR;
D O I：
10.1088/1748-0221/13/02/T02005
中图分类号：
TH7 [仪器、仪表];
学科分类号：
0804 ; 080401 ; 081102 ;
摘要：
The hybrid pixel detector technology brought to the X-ray imaging a low noise level at a high spatial resolution, thanks to the single photon counting. However, silicon as the most widespread detector material is marginally sensitive to photons with energies above 30 keV. Therefore, the high-Z alternatives to silicon such as gallium arsenide and cadmium telluride are increasingly attracting attention of the community for the development of X-ray imaging systems. The results of our investigations of the Timepix detectors bump bonded to sensors made of gallium arsenide compensated by chromium (GaAs:Cr) are presented in this work. The following properties are most important from the practical point of view: the IV characteristics, the charge transport characteristics, photon detection efficiency, operational stability, homogeneity, temperature dependence, as well as energy and spatial resolution are considered. The applicability of these detectors for spectroscopic X-ray imaging is discussed.
引用
收藏
页数：20
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