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Title: Front-end ASIC for spectroscopic readout of virtual Frisch-grid CZT bar sensors

Abstract

Compact multi-channel radiation detectors rely on low noise front-end application specific integrated circuits (ASICs) to achieve high spectral resolution. Here, a new ASIC developed to readout virtual Frisch-grid cadmium zinc telluride (VFG CZT) detectors for gamma ray spectroscopy is presented. Corresponding to each ionizing event in the detector, the ASIC measures the amplitude and timing at the anode, the cathode and four pad sense electrodes associated with each sensor in a detector array. The ASIC is comprised of 52 channels of which there are 4 cathode channels and 48 channels which can be configured as either anode channels with a baseline of 250 mV or pad sense channels to process induced signals with a baseline of 1.2 V. With a static power dissipation of 3 mW, each channel performs low-noise charge amplification, high-order shaping, peak and timing detection along with analog storage and multiplexing. The overall channel linearity was better than ± 1% with timing resolution down to 700 ps for charges greater than 8 fC in the 3 MeV range. With a 4 × 4 array of 6 mm × 6 mm × 20 mm virtual Frisch-grid bar sensors connected and biased, an electronic resolution of ≈270 e -rmsmore » for charges up to 100 fC in the 3.2 MeV range was measured. Spectral measurements obtained with the 3D correction technique demonstrated resolutions of 1.8% FWHM at 238 keV and 0.9% FWHM at 662 keV.« less

Authors:
 [1];  [2];  [3];  [2];  [3];  [4];  [3];  [3];  [3];  [3];  [3];  [3];  [3]
  1. Brookhaven National Lab. (BNL), Upton, NY (United States); Stony Brook Univ., NY (United States)
  2. Stony Brook Univ., NY (United States)
  3. Brookhaven National Lab. (BNL), Upton, NY (United States)
  4. Idaho National Lab. (INL), Idaho Falls, ID (United States)
Publication Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
OSTI Identifier:
1529886
Alternate Identifier(s):
OSTI ID: 1528638
Report Number(s):
BNL-211806-2019-JAAM
Journal ID: ISSN 0168-9002
Grant/Contract Number:  
SC0012704
Resource Type:
Accepted Manuscript
Journal Name:
Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment
Additional Journal Information:
Journal Volume: 940; Journal Issue: C; Journal ID: ISSN 0168-9002
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; Application Specific Integrated Circuit (ASIC); low noise front-end; mixed signal; Cadmium Zinc telluride (CdZnTe or CZT); thallium bromide (TlBr); mercuric iodide (HgI2); virtual Frisch-grid; 3D; gamma ray; spectroscopy; radiation detection

Citation Formats

Vernon, Emerson, De Geronimo, Gianluigi, Bolotnikov, Aleksey, Stanacevic, Milutin, Fried, Jack, Giraldo, Luis Ocampo, Smith, Graham, Wolniewicz, Kevin, Ackley, Kim, Salwen, Cynthia, Triolo, John, Pinelli, Don, and Luong, Kenny. Front-end ASIC for spectroscopic readout of virtual Frisch-grid CZT bar sensors. United States: N. p., 2019. Web. doi:10.1016/j.nima.2019.05.047.
Vernon, Emerson, De Geronimo, Gianluigi, Bolotnikov, Aleksey, Stanacevic, Milutin, Fried, Jack, Giraldo, Luis Ocampo, Smith, Graham, Wolniewicz, Kevin, Ackley, Kim, Salwen, Cynthia, Triolo, John, Pinelli, Don, & Luong, Kenny. Front-end ASIC for spectroscopic readout of virtual Frisch-grid CZT bar sensors. United States. doi:10.1016/j.nima.2019.05.047.
Vernon, Emerson, De Geronimo, Gianluigi, Bolotnikov, Aleksey, Stanacevic, Milutin, Fried, Jack, Giraldo, Luis Ocampo, Smith, Graham, Wolniewicz, Kevin, Ackley, Kim, Salwen, Cynthia, Triolo, John, Pinelli, Don, and Luong, Kenny. Fri . "Front-end ASIC for spectroscopic readout of virtual Frisch-grid CZT bar sensors". United States. doi:10.1016/j.nima.2019.05.047.
@article{osti_1529886,
title = {Front-end ASIC for spectroscopic readout of virtual Frisch-grid CZT bar sensors},
author = {Vernon, Emerson and De Geronimo, Gianluigi and Bolotnikov, Aleksey and Stanacevic, Milutin and Fried, Jack and Giraldo, Luis Ocampo and Smith, Graham and Wolniewicz, Kevin and Ackley, Kim and Salwen, Cynthia and Triolo, John and Pinelli, Don and Luong, Kenny},
abstractNote = {Compact multi-channel radiation detectors rely on low noise front-end application specific integrated circuits (ASICs) to achieve high spectral resolution. Here, a new ASIC developed to readout virtual Frisch-grid cadmium zinc telluride (VFG CZT) detectors for gamma ray spectroscopy is presented. Corresponding to each ionizing event in the detector, the ASIC measures the amplitude and timing at the anode, the cathode and four pad sense electrodes associated with each sensor in a detector array. The ASIC is comprised of 52 channels of which there are 4 cathode channels and 48 channels which can be configured as either anode channels with a baseline of 250 mV or pad sense channels to process induced signals with a baseline of 1.2 V. With a static power dissipation of 3 mW, each channel performs low-noise charge amplification, high-order shaping, peak and timing detection along with analog storage and multiplexing. The overall channel linearity was better than ± 1% with timing resolution down to 700 ps for charges greater than 8 fC in the 3 MeV range. With a 4 × 4 array of 6 mm × 6 mm × 20 mm virtual Frisch-grid bar sensors connected and biased, an electronic resolution of ≈270 e-rms for charges up to 100 fC in the 3.2 MeV range was measured. Spectral measurements obtained with the 3D correction technique demonstrated resolutions of 1.8% FWHM at 238 keV and 0.9% FWHM at 662 keV.},
doi = {10.1016/j.nima.2019.05.047},
journal = {Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment},
number = C,
volume = 940,
place = {United States},
year = {2019},
month = {5}
}

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This content will become publicly available on May 24, 2020
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