NDLI: Simulation of the collection properties of CdTe strip detectors

Content Provider	IEEE Xplore Digital Library
Author	Cola, A. Quaranta, F. Caroli, E. Dusi, W. Perillo, E.
Copyright Year	1963
Abstract	CdTe is an attractive material for X-ray and gamma-ray detectors, but the poor transport properties of holes affect the performance by introducing a low energy tailing in the observed spectra. A possible solution to this problem is to optimize the electrode geometry, for example, by reducing the dimension of the anode with respect to the cathode. In this way, the charge signal in the external circuit is mostly due to the electrons moving toward the anode that is where the weighing field becomes localized. The optimization of the electrode geometry can be approached by a numerical analysis as the problem of charge collection is strictly connected to trapping and detrapping processes, which are difficult to analytically treat in nonuniform electric fields. In this paper, we present a numerical simulator based on a finite difference numerical method (which follows the weighing field approach) and on a Monte-Carlo procedure, which is able to analyze, in two dimensions, the effect of different electrode configurations: single strip, multiple strip, a single strip with a lateral extended cathode, and, for comparison, the uniform geometry. The results are analyzed in terms of the maps of the local charge collection efficiency and their histograms, equivalent to spectra due to high-energy X-rays.
Sponsorship	IEEE Nuclear and Plasma Sciences Society Computer Applications in Nuclear and Plasma Sciences (CANPS) Lawrence Berkeley Lab. Lawrence Livermore Nat. Lab. APS College of William and Mary Continuous Electron Beam Accelerator Facility NASA Defence Nuclear Agency Sandia National Laboratories Jet Propulsion Laboratory Brookhaven Nat. Lab. Lawrence Livermore Nat. Lab IEEE/NPPS Radiat. Effects Committee Defence Nuclear Agency/DoD Sandia National Laboratories/DOE Jet Propulsion Laboratory/NASA Phillips Lab./DoD
Starting Page	292
Ending Page	295
Page Count	4
File Size	76437
File Format	PDF
ISSN	00189499
Volume Number	48
Issue Number	3
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2001-06-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Strips Electrodes Geometry Anodes Cathodes Gamma ray detectors Circuits Numerical analysis Electron traps Nonuniform electric fields
Content Type	Text
Resource Type	Article
Subject	Nuclear and High Energy Physics Electrical and Electronic Engineering Nuclear Energy and Engineering

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