Numerical modeling of charge sharing in CdZnTe pixel detectors

被引：31

作者：

Chen, CMH ^{[1
]}

Boggs, SE ^{[1
]}

Bolotnikov, AE ^{[1
]}

Cook, WR ^{[1
]}

Harrison, FA ^{[1
]}

Schindler, SM ^{[1
]}

机构：

[1] CALTECH, Pasadena, CA 91125 USA

来源：

IEEE TRANSACTIONS ON NUCLEAR SCIENCE | 2002年 / 49卷 / 01期

关键词：

CdZnTe radiation detectors; charge carrier processes; semiconductor device modeling; X-ray astronomy detectors;

D O I：

10.1109/TNS.2002.998652

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

In this paper, we describe charge collection in CdZnTe pixel detectors, with emphasis on events split between multiple pixels (charge-sharing events). We describe the design of the CdZnTe pixel sensors, being developed for the balloon-borne High-Energy Focusing Telescope (HEFT), and discuss investigations of charge sharing between pixels. We have developed a numerical model that emulates the physical processes of charge transport within the CdZnTe crystal. We discuss this numerical model in detail here. With this model, we are able to reproduce the general features of charge-sharing events. We have found that the amount of charge loss is very sensitive to the surface mutau (the product of charge mobility and trapping time), and we present estimates of (mutau)(surface) derived from our model. Further work will focus on more detailed analysis of diffusion in order to gain a complete understanding of these charge-sharing events in CdZnTe pixel detectors.

引用

页码：270 / 276

页数：7

共 10 条

[1]

[Anonymous], 1986, NUMERICAL RECIPES C

[2] Beam test of prototype 18 cm silicon-strip detectors with high speed electronics [J].

Arodzero, A ;

Brau, JE ;

Frey, RE ;

Gao, D ;

Kollipara, RT ;

Langston, M ;

Mason, D ;

Sinev, N ;

Strom, D ;

Yang, X ;

Brooks, M ;

Lee, D ;

Mills, G .

IEEE TRANSACTIONS ON NUCLEAR SCIENCE, 1996, 43 (03) :1180-1187

[3]

BOGGS SE, 1998, THESIS U CALIFORNIA

[4] Investigation of optimal contact geometries for CdZnTe pixel detectors [J].

Bolotnikov, AE ;

Boggs, SE ;

Chen, CMH ;

Cook, WR ;

Harrison, FA ;

Schindler, SM .

HARD X-RAY GAMMA-RAY AND NEUTRON DETECTOR PHYSICS II, 2000, 4141 :243-252

[5] Use of a pulsed laser to study properties of CdZnTe pixel detectors [J].

Bolotnikov, AE ;

Boggs, SE ;

Cook, WR ;

Harrison, FA ;

Schindler, SM .

PENETRATING RADIATION SYSTEMS AND APPLICATIONS, 1999, 3769 :52-58

[6] First test results from a high resolution CdZnTe pixel detector with VLSI readout [J].

Cook, WR ;

Boggs, SE ;

Bolotnikov, AE ;

Burnham, JA ;

Harrison, FA ;

Kecman, B ;

Matthews, B ;

Schindler, SM ;

Fitzsimmons, MJ .

PENETRATING RADIATION SYSTEMS AND APPLICATIONS, 1999, 3769 :92-96

[7] Low-noise custom VLSI for CdZnTe pixel detectors [J].

Cook, WR ;

Burnham, JA ;

Harrison, FA .

EUV, X-RAY, AND GAMMA-RAY INSTRUMENTATION FOR ASTRONOMY IX, 1998, 3445 :347-354

[8] Development of the High-Energy Focusing Telescope (HEFT) balloon experiment [J].

Harrison, FA ;

Boggs, SE ;

Bolotnikov, A ;

Christensen, FE ;

Cook, WR ;

Craig, WW ;

Hailey, CJ ;

Jimenez-Garate, M ;

Mao, PH ;

Schindler, SE ;

Windt, DL .

X-RAY OPTICS, INSTRUMENTS, AND MISSIONS III, 2000, 4012 :693-699

[9] Charge splitting among anodes of a CdZnTe strip detector [J].

Kalemci, E ;

Matteson, JL .

HARD X-RAY GAMMA-RAY AND NEUTRON DETECTOR PHYSICS II, 2000, 4141 :235-242

[10] Simulations of pulse shape discrimination (PSD) techniques for background reduction in germanium detectors [J].

Philhour, B ;

Boggs, SE ;

Primbsch, JH ;

Slassi-Sennou, AS ;

Lin, RP ;

Feffer, PT ;

McBride, S ;

Goulding, FS ;

Madden, NW ;

Pehl, RH .

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 1998, 403 (01) :136-150

← 1 →