Electric field dependence on charge collection of CdZnTe x-ray detectors

G. C. Giakos, B. Pillai, S. Vedantham, S. Chowdhuri, J. Odogba, A. Dasgupta, V. Vega-Lozada, R. Guntupalli, S. Suryanarayanan, R. J. Endorf, A. Passalaqua, S. Kollipara

Research output: Contribution to journalArticlepeer-review

22 Scopus citations


In this study, the electric field dependence on the charge collection process of CdZnTe detectors, at different x-ray tube settings, within the x-ray diagnostic energy range, is investigated. In addition, the detector contrast at different applied bias voltages and x-ray tube settings have been experimentally determined. The experimental results suggest that an efficient charge collection process is obtained by increasing the applied bias voltage. Once the applied bias voltage is sufficiently high, charge collection becomes complete and the detector operates in the saturation region. This is a prerequisite for high contrast and spatial resolution. As a result, the detector contrast is enhanced significantly. Therefore, CdZnTe detectors appear to be potential candidates for digital radiographic applications.

Original languageEnglish (US)
Pages (from-to)198-210
Number of pages13
JournalJournal of X-Ray Science and Technology
Issue number2
StatePublished - Jun 1997
Externally publishedYes

ASJC Scopus subject areas

  • Radiation
  • Instrumentation
  • Radiology Nuclear Medicine and imaging
  • Condensed Matter Physics
  • Electrical and Electronic Engineering


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