skip to main content

SciTech ConnectSciTech Connect

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

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 mm{sup 3} 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.
Authors:
; ; ; ; ; ; ; ; ; ; ; ; ; ;  [1] ;  [2] ;  [3] ;  [4]
  1. Brookhaven National Laboratory, Upton, New York 11793 (United States)
  2. University of Texas at El Paso, El Paso, Texas 79968 (United States)
  3. Korea University, Seoul 136-855 (Korea, Republic of)
  4. SUNY Binghamton, Vestal, New York 13902 (United States)
Publication Date:
OSTI Identifier:
22482704
Resource Type:
Journal Article
Resource Relation:
Journal Name: Review of Scientific Instruments; Journal Volume: 86; Journal Issue: 7; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; ANODES; APERTURES; CATHODES; CRYSTAL DEFECTS; GAMMA CAMERAS; GAMMA RADIATION; INTEGRATED CIRCUITS; READOUT SYSTEMS; SPECTROSCOPY; TESTING