An array of virtual Frisch-grid CdZnTe detectors and a front-end application-specific integrated circuit for large-area position-sensitive gamma-ray cameras

A. E. Bolotnikov, K. Ackley, G. S. Camarda, C. Cherches, Y. Cui, G. De Geronimo, J. Fried, D. Hodges, A. Hossain, W. Lee, G. Mahler, M. Maritato, M. Petryk, U. Roy, C. Salwen, E. Vernon, G. Yang, R. B. James

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

We developed a robust and low-cost array of virtual Frisch-grid CdZnTe detectors coupled to a front-end readout application-specific integrated circuit (ASIC) for spectroscopy and imaging of gamma rays. The array operates as a self-reliant detector module. It is comprised of 36 close-packed 6 × 6 × 15 mm3 detectors grouped into 3 × 3 sub-arrays of 2 × 2 detectors with the common cathodes. The front-end analog ASIC accommodates up to 36 anode and 9 cathode inputs. Several detector modules can be integrated into a single- or multi-layer unit operating as a Compton or a coded-aperture camera. We present the results from testing two fully assembled modules and readout electronics. The further enhancement of the arrays' performance and reduction of their cost are possible by using position-sensitive virtual Frisch-grid detectors, which allow for accurate corrections of the response of material non-uniformities caused by crystal defects.

Original languageEnglish
Article number073114
JournalReview of Scientific Instruments
Volume86
Issue number7
DOIs
Publication statusPublished - 2015 Jul 1

ASJC Scopus subject areas

  • Instrumentation

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    Bolotnikov, A. E., Ackley, K., Camarda, G. S., Cherches, C., Cui, Y., De Geronimo, G., Fried, J., Hodges, D., Hossain, A., Lee, W., Mahler, G., Maritato, M., Petryk, M., Roy, U., Salwen, C., Vernon, E., Yang, G., & James, R. B. (2015). An array of virtual Frisch-grid CdZnTe detectors and a front-end application-specific integrated circuit for large-area position-sensitive gamma-ray cameras. Review of Scientific Instruments, 86(7), [073114]. https://doi.org/10.1063/1.4927455