Development of CdZnTe X-ray detectors at DSRI

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

An overview of the development of CdZnTe X-ray detectors at the Danish Space Research Institute is presented. Initiated in the beginning of 1996, the main motivation at that time was to develop focal plane detectors for the novel type of hard X-ray telescopes, which are currently under study at DSRI. With the advent of the Danish Micro Satellite program it was, however, recognised that this type of detector is very well suited for two proposed missions (eXCALIBur, AXO). The research at DSRI has so far been concentrated on the spectroscopic properties of the CZT detector. At DSRI we have developed a technique, which, with the use of microstrip electrodes, is able to compensate for the signal loss caused by trapping of positive charge carriers. This technique leads to a dramatic improvement of the achievable energy resolution, even for crystals of poor quality. With the technique, hole trapping has now little influence and the spectrum displays a pronounced Gaussian peak at 661 keV with a width (FWHM) of 6.9 keV. Also a small peak produced by CdTe escape events can now be observed. At the same time, no events have to be rejected.
Original languageEnglish
JournalNuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment
Volume439
Issue number2-3
Pages (from-to)625-633
ISSN0168-9002
Publication statusPublished - 2000

Keywords

  • modification and application
  • unipolar sensing
  • CdZnTe
  • detector
  • semiconductor detectors
  • X-ray detectors

Fingerprint

Dive into the research topics of 'Development of CdZnTe X-ray detectors at DSRI'. Together they form a unique fingerprint.

Cite this