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

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

doi:10.1016/j.nima.2019.05.047

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

Journal Article · Fri May 24 00:00:00 EDT 2019 · Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment

DOI:https://doi.org/10.1016/j.nima.2019.05.047· OSTI ID:1529886

Vernon, Emerson ^[1]; De Geronimo, Gianluigi ^[2]; Bolotnikov, Aleksey ^[3]; Stanacevic, Milutin ^[2]; Fried, Jack ^[3]; Giraldo, Luis Ocampo ^[4]; Smith, Graham ^[3]; Wolniewicz, Kevin ^[3]; Ackley, Kim ^[3]; Salwen, Cynthia ^[3]; Triolo, John ^[3]; Pinelli, Don ^[3]; Luong, Kenny ^[3]

Brookhaven National Lab. (BNL), Upton, NY (United States); Stony Brook Univ., NY (United States)
Stony Brook Univ., NY (United States)
Brookhaven National Lab. (BNL), Upton, NY (United States)
Idaho National Lab. (INL), Idaho Falls, ID (United States)

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.

View Accepted Manuscript (DOE)

Research Organization:: Brookhaven National Laboratory (BNL), Upton, NY (United States); Idaho National Laboratory (INL), Idaho Falls, ID (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA), Office of Defense Nuclear Nonproliferation (NA-20); USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)

Grant/Contract Number:: AC07-05ID14517; SC0012704

OSTI ID:: 1529886

Alternate ID(s):: OSTI ID: 1528638
OSTI ID: 1550913

Report Number(s):: BNL--211806-2019-JAAM; INL/JOU--19-52951-Rev000

Journal Information:: Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment, Journal Name: Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment Journal Issue: C Vol. 940; ISSN 0168-9002

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
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