NDLI: Characterizing IMARAD CZT detectors with time resolved anode and cathode signals

Content Provider	IEEE Xplore Digital Library
Author	Perkins, J. Krawczynski, H. Dowkontt, P.
Copyright Year	2004
Description	Author affiliation: Dept. of Phys., Washington Univ., St. Louis, MO, USA (Perkins, J.; Krawczynski, H.; Dowkontt, P.)
Abstract	We present the results of using standard IMARAD CZT detectors with a 100 MHz readout of the anode and cathode pulses. The detectors, 2 cm x 2 cm large and 0.5 cm thick, have 64 indium pixellated anode contacts at a pitch of 2.5 mm. We investigate the possibilities to improve on the detector's photo-peak efficiency and energy resolution using two depth of interaction (DOI) indicators: (i) the total charge induced on the cathode and (ii) the drift time of the electron cloud determined from the anode and/or the cathode pulses. The DOI correction with the cathode charge gives better results, increasing the 662 keV photo-peak efficiency by 57% and improving the energy resolution from 2.33% to 2.15% (FWHM, including the electronic noise). The information on the time dependence of the induced charge can be used as a diagnostic tool to understand the performance of the detector. Detailed comparison of the pulse shapes with detector simulations gives the electron mobility and drift time and makes it possible to assess the weighting potential and electric field inside the detector.
Starting Page	3366
Ending Page	3369
File Size	5768463
Page Count	4
File Format	PDF
ISBN	0780382579
ISSN	10823654
DOI	10.1109/NSSMIC.2003.1352627
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2003-10-19
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Detectors Signal resolution Anodes Cathodes Energy resolution Indium Electrons Clouds Noise shaping Pulse shaping methods
Content Type	Text
Resource Type	Article

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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