A simple method to improve the spatial uniformity of venetian-blind photomultiplier tubes

Journal Article · Sat Jun 01 00:00:00 EDT 1996 · IEEE Transactions on Nuclear Science

DOI:https://doi.org/10.1109/23.507061· OSTI ID:277665

Santos, J M.F. dos; Veloso, J F.C.A. ^[1]; Lopes, J A.M. ^[1]; Morgado, R E ^[2]

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1. Univ. of Coimbra (Portugal). Physics Dept.
2. Los Alamos National Lab., NM (United States)

An improvement in the uniformity of venetian-blind photomultiplier tubes has been achieved by reducing the voltage difference between the first and second dynodes. The method has been applied to a gas proportional scintillation counter (GPSC) instrumented with a venetian-blind photomultiplier (PMT). When exposed to a 20-mm collimated 5.9-keV x-ray beam, an overall improvement in energy resolution for the GPSC/PMT combination from 20% to 11.5% was achieved. An alternative method that reduces the photocathode-to-first-dynode voltage was less effective and resulted in a severe degradation of detector energy resolution.

• OSTI ID: 277665
• Report Number(s): CONF-951073--
• Journal Information: IEEE Transactions on Nuclear Science, Journal Name: IEEE Transactions on Nuclear Science Journal Issue: 3Pt2 Vol. 43; ISSN 0018-9499; ISSN IETNAE
• Country of Publication: United States
• Language: English

Related Subjects

44 INSTRUMENTATION
INCLUDING NUCLEAR AND PARTICLE DETECTORS
DESIGN
ELECTRIC POTENTIAL
ENERGY RESOLUTION
GAS SCINTILLATION DETECTORS
PHOTOMULTIPLIERS
PROPORTIONAL COUNTERS
X-RAY DETECTION