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Proceedings Paper

Use of a pulsed laser to study properties of CdZnTe pixel detectors
Author(s): Aleksey E. Bolotnikov; Steven E. Boggs; Walter R. Cook; Fiona A. Harrison; Steven M. Schindler
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Paper Abstract

We have investigated the utility of employing a short (<4 ns) pulsed laser with wavelength tunable between 600 - 950 nm as a tool for studying and characterizing CdZnTe detectors. By using a single mode optical fiber and simple optics, we can focus the beam to a spot size of less than 10 micrometers and generate the number of the excess carriers equivalent to a several MeV gamma-ray either at the surface or deep inside the sample. The advantages of this technique over use of a collimated X-ray or alpha particle source are strong induced signal, precise pointing, and triggering capability. As examples of using this technique, we present the results of measurements of the drift velocity, electron lifetime, and electric field line distribution inside CZT pixel detectors.

Paper Details

Date Published: 1 October 1999
PDF: 7 pages
Proc. SPIE 3769, Penetrating Radiation Systems and Applications, (1 October 1999); doi: 10.1117/12.363691
Show Author Affiliations
Aleksey E. Bolotnikov, California Institute of Technology (United States)
Steven E. Boggs, California Institute of Technology (United States)
Walter R. Cook, California Institute of Technology (United States)
Fiona A. Harrison, California Institute of Technology (United States)
Steven M. Schindler, California Institute of Technology (United States)

Published in SPIE Proceedings Vol. 3769:
Penetrating Radiation Systems and Applications
F. Patrick Doty, Editor(s)

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