Edge reclamation in position-sensitive photomultiplier tubes

Les Nakae; Klaus Ziock

doi:10.1117/12.366581

19 October 1999 Edge reclamation in position-sensitive photomultiplier tubes

Les Nakae, Klaus Ziock

Proceedings Volume 3768, Hard X-Ray, Gamma-Ray, and Neutron Detector Physics; (1999) https://doi.org/10.1117/12.366581
Event: SPIE's International Symposium on Optical Science, Engineering, and Instrumentation, 1999, Denver, CO, United States

Abstract

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. The R3292 has an active area 10.0 cm in diameter. 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 starts to degrade as one reaches a radius of only 3.5 cm, reducing the active area by 60 percent. 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.

Citation Download Citation

Les Nakae and Klaus Ziock "Edge reclamation in position-sensitive photomultiplier tubes", Proc. SPIE 3768, Hard X-Ray, Gamma-Ray, and Neutron Detector Physics, (19 October 1999); https://doi.org/10.1117/12.366581

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