Edge reclamation in position-sensitive photomultiplier tubes

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We have investigated the performance of a position-sensitive, gamma-ray detector based on a CsI(Na) scintillator coupled to a Hamamatsu R3292 Position-Sensitive Photomultiplier Tube (PSPMT). The R3292 has an active area 10.0 cm in diameter (quoted). Utilization of the full active area of the photocathode is a goal that has been previously unrealized due to edge effects. Initial measurements with a 0.75 cm thick CsI(Na) crystal indicate that the performance (position resolution linearity) starts to degrade as one reaches a radius of only 3.5 cm, reducing the active area by 60%. Measuring the anode wires we have found that this fall ... continued below

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210 Kilobytes pages

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Nakae, L & Ziock, K June 16, 1999.

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Description

We have investigated the performance of a position-sensitive, gamma-ray detector based on a CsI(Na) scintillator coupled to a Hamamatsu R3292 Position-Sensitive Photomultiplier Tube (PSPMT). The R3292 has an active area 10.0 cm in diameter (quoted). Utilization of the full active area of the photocathode is a goal that has been previously unrealized due to edge effects. Initial measurements with a 0.75 cm thick CsI(Na) crystal indicate that the performance (position resolution linearity) starts to degrade as one reaches a radius of only 3.5 cm, reducing the active area by 60%. Measuring the anode wires we have found that this fall off is not solely due to crystal edge effects, but rather is inherent to the tube crystal system. In this paper we describe the results of our measurements and how good performance can be maintained across a full 10cm of the tube face through the use of a few additional electronics channels.

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210 Kilobytes pages

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  • Society of Photo-Optical Instrumentation Engineers, Denver, CO (US), 07/12/1999--07/16/1999

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  • Report No.: UCRL-JC-133338
  • Report No.: GJ1200000
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 9378
  • Archival Resource Key: ark:/67531/metadc794431

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • June 16, 1999

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  • Dec. 19, 2015, 7:14 p.m.

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  • Feb. 16, 2016, 6:32 p.m.

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Nakae, L & Ziock, K. Edge reclamation in position-sensitive photomultiplier tubes, article, June 16, 1999; California. (digital.library.unt.edu/ark:/67531/metadc794431/: accessed November 19, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.