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Title: Array of High-Granularity Position-Sensitive Virtual Frisch-Grid Detectors (BL16-CZTFrischGrid-PD2Kb)

Abstract

Schubert Independent Review for two CZT Project at BNL. October 5, 2016 Title Array of High-Granularity Position-Sensitive Virtual Frisch-Grid Detectors (BL16-CZTFrischGrid-PD2Kb)

Authors:
 [1]
  1. Brookhaven National Lab. (BNL), Upton, NY (United States)
Publication Date:
Research Org.:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA), Office of Nonproliferation and Verification Research and Development (NA-22)
OSTI Identifier:
1338592
Report Number(s):
BNL-112741-2016
TRN: US1701448
DOE Contract Number:
SC00112704
Resource Type:
Technical Report
Resource Relation:
Related Information: Not a Conference - Independent Review of two CZT Projects at Brookhaven National Laboratory. BL16-CZTFrischGrid-PD2Kb Independent Review Array of High-Granularity Position-Sensitive Virtual Frisch-Grid Detectors ; Brookhaven National Laboratory NNS Department Lg Conference Room Number 2-86; 20161005 through 20161006
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; POSITION SENSITIVE DETECTORS; CDZNTE SEMICONDUCTOR DETECTORS; PERFORMANCE; Array; CZT; High-Granularity; Position-Sensitive; Frisch-Grid; Detectors

Citation Formats

Bolotnikov, Aleksey. Array of High-Granularity Position-Sensitive Virtual Frisch-Grid Detectors (BL16-CZTFrischGrid-PD2Kb). United States: N. p., 2016. Web. doi:10.2172/1338592.
Bolotnikov, Aleksey. Array of High-Granularity Position-Sensitive Virtual Frisch-Grid Detectors (BL16-CZTFrischGrid-PD2Kb). United States. doi:10.2172/1338592.
Bolotnikov, Aleksey. 2016. "Array of High-Granularity Position-Sensitive Virtual Frisch-Grid Detectors (BL16-CZTFrischGrid-PD2Kb)". United States. doi:10.2172/1338592. https://www.osti.gov/servlets/purl/1338592.
@article{osti_1338592,
title = {Array of High-Granularity Position-Sensitive Virtual Frisch-Grid Detectors (BL16-CZTFrischGrid-PD2Kb)},
author = {Bolotnikov, Aleksey},
abstractNote = {Schubert Independent Review for two CZT Project at BNL. October 5, 2016 Title Array of High-Granularity Position-Sensitive Virtual Frisch-Grid Detectors (BL16-CZTFrischGrid-PD2Kb)},
doi = {10.2172/1338592},
journal = {},
number = ,
volume = ,
place = {United States},
year = 2016,
month =
}

Technical Report:

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  • We present a concept for a calorimeter based on a novel approach of 3D position-sensitive virtual Frischgrid CZT detectors. This calorimeter aims to measure photons with energies from ~100 keV to 10 (goal 50) MeV. The expected energy resolution at 662 keV is ~1% FWHM, and the photon interaction positionmeasurement accuracy is ~1 mm in all 3 dimensions. Each CZT bar is a rectangular prism with typical cross-section of 6x6 mm 2 and length of 2-4 cm. The bars are arranged in modules of 4 x 4 bars, and the modules themselves can be assembled into a larger array. Themore » 3D virtual voxel approach solves a long-standing problem with CZT detectors associated with material imperfections that limit the performance and usefulness of relatively thick detectors (i.e., > 1 cm). Also, it allows us to relax the requirements on the quality of the crystals, maintaining good energy resolution and significantly reducing the instrument cost. Such a calorimeter can be successfully used in space telescopes that use Compton scattering of γ rays, such as AMEGO, serving as part of its calorimeter and providing the position and energy measurement for Compton-scattered photons. Also, it could provide suitable energy resolution to allow for spectroscopic measurements of γ-ray lines from nuclear decays. Another viable option is to use this calorimeter as a focal plane to conduct spectroscopic measurements of cosmic γ-ray events. In combination with a coded-aperture mask, it potentially could provide mapping of the 511-keV radiation from the Galactic Center region.« less
  • Incorporate an array of the novel position-sensitive virtual Frisch-grid CdZnTe detectors into the existing FLIR instrument (R200)
  • Cited by 2
  • We developed a robust and low-cost array of virtual Frisch-grid CdZnTe (CZT) detectors coupled to a front-end readout ASIC for spectroscopy and imaging of gamma rays. The array operates as a self-reliant detector module. It is comprised of 36 close-packed 6x6x15 mm 3 detectors grouped into 3x3 sub-arrays of 2x2 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 readoutmore » electronics. The further enhancement of the arrays’ performance and reduction of their cost are made 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.« less
  • 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 presentmore » 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.« less