Development of a Multipurpose Gamma-Ray Imaging Detector Module with Enhanced Expandability

Eungi Min, Young Jun Jung, Hakjae Lee, Jinwook Jang, Kyeong Min Kim, Sung-Kwan Joo, Kisung Lee

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

A silicon photomultiplier (SiPM) is considered a next generation photo-sensor for low-light applications. In this study, we propose and develop the general concept of a multipurpose submillimeter gamma-ray (MSG) imaging module that is applicable to most gamma-ray imaging devices. The main features of the MSG module are submillimeter intrinsic resolution, geometrically expandable structure, expandable data acquisition system, multi-energy capability and usability in intense magnetic fields. The elements of the gamma-ray detector are pixelated Ce:GAGG ( $31\times 31$ pixels, 0.8 mm pitch), a 1.5-mm acrylic light guide, and one SiPM array ( $8 \times 8$ pixels). The readout electronics are composed of a symmetric charge division resistive network, 16 channel preamplifiers, multiplexing amplifiers, and analog-to-digital converter (ADC) circuits. We use a subminiature field-programmable gate array (FPGA) board as a data acquisition system. To make the system more expandable, we apply a 10 GbE-based tree structure using a FPGA-based data acquisition board and switching hub. To verify multipurpose capabilities, the energy spectra and the flood images are obtained using Co-57, Na-22, and Cs-137 isotopes. We measure temperature characteristics of the detector module. A pinhole image is obtained to confirm high resolution property. The maximal data transfer rate that is measured using dummy gamma-ray event packets is 963.143 Mbps. This detector module can be applied to nuclear medicine imaging devices and radiation monitoring systems.

Original languageEnglish
Article number7809059
Pages (from-to)1833-1839
Number of pages7
JournalIEEE Transactions on Nuclear Science
Volume64
Issue number7
DOIs
Publication statusPublished - 2017 Jul 1

Keywords

  • Data acquisition
  • gamma-ray detector
  • readout electronics
  • silicon photomultipliers

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Nuclear Energy and Engineering
  • Electrical and Electronic Engineering

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