skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: A 4 x 4 array module of position-sensitive virtual Frisch-grid CdZnTe detectors for gamma-ray imaging spectrometers

Abstract

Arrays of position-sensitive virtual Frisch-grid CdZnTe (CZT) detectors offer an economical approach to making high efficiency and high energy resolution gamma cameras for spectroscopy and imaging of radioactive sources. There are many application areas for such instruments including gamma-rays astronomy, medical and industrial imaging, nonproliferation and nuclear safeguards. We present the test results from a 4x4 array module coupled to the front-end ASIC. The array houses 16 detectors made of 6x6x20 mm 3 CZT crystals. Each crystal is encapsulated inside an ultrathin polyester shell and furnished with four 5-mm-wide charge-sensing pads placed near the anode on each side of the detector. The pad’s signals are used to measure X-Y coordinates while the cathode signals give the interaction depths (Z coordinates). Combined together the signals provide 3D position information of the interaction points which can be used to correct the detector response non-uniformity. This allows developers to use standard grade (unselected) CZT crystals while retaining high spectroscopic performance comparable with that of the H3D pixelated detectors. The array’s design provides flexibility to replace individual detectors and extend their sizes, potentially increasing upwards of 4 cm in height. We started development of position-sensitive VFG detectors several years ago and today this technologymore » has reached a high-maturity level and is ready to use in practical applications.« less

Authors:
 [1];  [1];  [1];  [1];  [2];  [1];  [3];  [1];  [1];  [1];  [4];  [5]
  1. Brookhaven National Lab. (BNL), Upton, NY (United States)
  2. Univ. of Texas, El Paso, TX (United States)
  3. Korea Univ., Seoul (Korea, Republic of)
  4. North Carolina State Univ., Raleigh, NC (United States)
  5. Savannah River Site (SRS), Aiken, SC (United States). Savannah River National Lab. (SRNL)
Publication Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States); Savannah River Site (SRS), Aiken, SC (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA), Office of Nonproliferation and Verification Research and Development (NA-22); USDOE
OSTI Identifier:
1463850
Alternate Identifier(s):
OSTI ID: 1512417
Report Number(s):
BNL-207926-2018-JAAM; SRNL-STI-2018-00481
Journal ID: ISSN 0168-9002; TRN: US1902333
Grant/Contract Number:  
SC0012704; AC02-98CH1-886; AC09-08SR22470
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment
Additional Journal Information:
Journal Volume: 954; Journal ID: ISSN 0168-9002
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; CdZnTe; CdZnTe detectors; Position-sensitive virtual Frisch-grid detectors; 3D charge-loss correction

Citation Formats

Bolotnikov, A. E., Camarda, G. S., De Geronimo, G., Fried, J., Hodges, D., Hossain, A., Kim, K., Mahler, G., Giraldo, L. Ocampo, Vernon, E., Yang, G., and James, R. B. A 4 x 4 array module of position-sensitive virtual Frisch-grid CdZnTe detectors for gamma-ray imaging spectrometers. United States: N. p., 2018. Web. doi:10.1016/j.nima.2018.07.090.
Bolotnikov, A. E., Camarda, G. S., De Geronimo, G., Fried, J., Hodges, D., Hossain, A., Kim, K., Mahler, G., Giraldo, L. Ocampo, Vernon, E., Yang, G., & James, R. B. A 4 x 4 array module of position-sensitive virtual Frisch-grid CdZnTe detectors for gamma-ray imaging spectrometers. United States. doi:10.1016/j.nima.2018.07.090.
Bolotnikov, A. E., Camarda, G. S., De Geronimo, G., Fried, J., Hodges, D., Hossain, A., Kim, K., Mahler, G., Giraldo, L. Ocampo, Vernon, E., Yang, G., and James, R. B. Mon . "A 4 x 4 array module of position-sensitive virtual Frisch-grid CdZnTe detectors for gamma-ray imaging spectrometers". United States. doi:10.1016/j.nima.2018.07.090. https://www.osti.gov/servlets/purl/1463850.
@article{osti_1463850,
title = {A 4 x 4 array module of position-sensitive virtual Frisch-grid CdZnTe detectors for gamma-ray imaging spectrometers},
author = {Bolotnikov, A. E. and Camarda, G. S. and De Geronimo, G. and Fried, J. and Hodges, D. and Hossain, A. and Kim, K. and Mahler, G. and Giraldo, L. Ocampo and Vernon, E. and Yang, G. and James, R. B.},
abstractNote = {Arrays of position-sensitive virtual Frisch-grid CdZnTe (CZT) detectors offer an economical approach to making high efficiency and high energy resolution gamma cameras for spectroscopy and imaging of radioactive sources. There are many application areas for such instruments including gamma-rays astronomy, medical and industrial imaging, nonproliferation and nuclear safeguards. We present the test results from a 4x4 array module coupled to the front-end ASIC. The array houses 16 detectors made of 6x6x20 mm3 CZT crystals. Each crystal is encapsulated inside an ultrathin polyester shell and furnished with four 5-mm-wide charge-sensing pads placed near the anode on each side of the detector. The pad’s signals are used to measure X-Y coordinates while the cathode signals give the interaction depths (Z coordinates). Combined together the signals provide 3D position information of the interaction points which can be used to correct the detector response non-uniformity. This allows developers to use standard grade (unselected) CZT crystals while retaining high spectroscopic performance comparable with that of the H3D pixelated detectors. The array’s design provides flexibility to replace individual detectors and extend their sizes, potentially increasing upwards of 4 cm in height. We started development of position-sensitive VFG detectors several years ago and today this technology has reached a high-maturity level and is ready to use in practical applications.},
doi = {10.1016/j.nima.2018.07.090},
journal = {Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment},
issn = {0168-9002},
number = ,
volume = 954,
place = {United States},
year = {2018},
month = {7}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record

Citation Metrics:
Cited by: 1 work
Citation information provided by
Web of Science

Save / Share: