Edge reclamation in position-sensitive photomultiplier tubes
- LLNL
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.
- Research Organization:
- Lawrence Livermore National Lab., CA (US)
- Sponsoring Organization:
- USDOE Office of Nonproliferation and National Security (NN) (US)
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 9378
- Report Number(s):
- UCRL-JC-133338; GJ1200000; GJ1200000
- Country of Publication:
- United States
- Language:
- English
Similar Records
Development of a small field of view scintimammography camera based on a YAP crystal array and a position sensitive PMT
Development of an application specific scintimammography detector based on a crystal scintillator array and a PSPMT