Charge Loss between contacts of CdZnTe pixel detectors

Creators: Bolotnikov, A. E.; Cook, W. R.; Harrison, F. A.; Wong, A-S.; Schindler, S. M.; Eichelberger, A. C.

Abstract

The surface of Cd_(1−x)Zn_xTe (CZT) material has high resistivity but is not a perfect dielectric. Even a small surface conductivity can affect the electric field distribution, and therefore, the charge collection efficiency of a CZT pixel detector. The paper describes studies of this phenomenon for several contact configurations made on a single CZT detector. We have determined the maximum inter-contact separation at which the surface inter-pixel charge loss can be neglected.

Additional Information

© 1999 Elsevier. Received 2 November 1998; received in revised form 1 March 1999. The authors wish to thank Dr. Carl Stahle from GSFC, J. A. Burnham and B. Matthews from CIT, and Dr. J. Liu and M. Fitzsimmons from JPL for helping to fabricate CZT pixel detectors; Dr. Finn E. Christensen from DSRT for his contribution in the design of the X-ray calibration system, and LLNL for loan of the X-ray generator.

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Resource type: Journal Article
Publisher: Elsevier
Published in: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 432(2-3), 326-331, ISSN: 0168-9002.

Created:: August 19, 2023
Modified:: October 20, 2023