Large-area PSPMT based gamma-ray imager with edge reclamation

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We describe a coded aperture, gamma-ray imager which uses a CsI(Na) scintillator coupled to an Hamamatsu R3292 position-sensitive photomultiplier tube (PSPMT) as the position-sensitive detector. We have modified the normal resistor divider readout of the PSPMT to allow use of nearly the full 10 cm diameter active area of the PSPMT with a single scintillator crystal one centimeter thick. This is a significant performance improvement over that obtained with the standard readout technique where the linearity and position resolution start to degrade at radii as small as 3.5 cm with a crystal 0.75 crn thick. This represents a recovery of ... continued below

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Ziock, K-P & Nakae, L September 21, 2000.

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Description

We describe a coded aperture, gamma-ray imager which uses a CsI(Na) scintillator coupled to an Hamamatsu R3292 position-sensitive photomultiplier tube (PSPMT) as the position-sensitive detector. We have modified the normal resistor divider readout of the PSPMT to allow use of nearly the full 10 cm diameter active area of the PSPMT with a single scintillator crystal one centimeter thick. This is a significant performance improvement over that obtained with the standard readout technique where the linearity and position resolution start to degrade at radii as small as 3.5 cm with a crystal 0.75 crn thick. This represents a recovery of over 60% of the PSPMT active area. The performance increase allows the construction of an imager with a field of view 20 resolution elements in diameter with useful quantum efficiency from 60-700 keV. In this paper we describe the readout technique, its implementation in a coded aperture imager and the performance of that imager.

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PDF-file: 11 pages; size: 7 Mbytes

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  • Journal Name: IEEE Transactions on Nuclear Science; Conference: 2000 Institute of Electrical and Electronics Engineers Nuclear Science Symposium and Medical Imaging Conference, Lyon, France, Oct 15 - Oct 20, 2000

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  • Report No.: UCRL-JC-138661
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 15004016
  • Archival Resource Key: ark:/67531/metadc1410578

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Office of Scientific & Technical Information Technical Reports

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  • September 21, 2000

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  • Jan. 23, 2019, 12:54 p.m.

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  • Jan. 29, 2019, 11:31 a.m.

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Ziock, K-P & Nakae, L. Large-area PSPMT based gamma-ray imager with edge reclamation, article, September 21, 2000; Livermore, California. (https://digital.library.unt.edu/ark:/67531/metadc1410578/: accessed March 24, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.