A large-area VUV photosensor with high gain by means of photoelectron acceleration and concentration

Journal Article · Tue Aug 01 04:00:00 EDT 1995 · IEEE Transactions on Nuclear Science

DOI:https://doi.org/10.1109/23.467819· OSTI ID:129150

Lopes, J A.M.; Conde, C A.N. ^[1]

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1. Univ. de Coimbra (Portugal). Dept. de Fisica

Photomultiplier tubes (PMT) are generally used to detect the vacuum ultraviolet (VUV) scintillation light produced in devices like gas proportional scintillation counters (GPSC). Here, the authors report the results of the development of a new photosensor with large area and high gain. The photoelectrons from a 48 mm diameter CsI photocathode are accelerated with high voltage and electrostatically concentrated, rather than imaged, onto the surface of an 8 mm diameter semiconductor detector. The amplitude of the photoelectron signals initiated by a pulsed xenon lamp of constant intensity and high stability (instability <1%) is approximately linear with the accelerating voltage in the 10 to 20 kV region. Non uniformity of the signal amplitude over 70% of the photocathode area is below 6%.

• OSTI ID: 129150
• Report Number(s): CONF-941061--
• Journal Information: IEEE Transactions on Nuclear Science, Journal Name: IEEE Transactions on Nuclear Science Journal Issue: 4Pt1 Vol. 42; ISSN 0018-9499; ISSN IETNAE
• Country of Publication: United States
• Language: English

Related Subjects

44 INSTRUMENTATION
INCLUDING NUCLEAR AND PARTICLE DETECTORS
CESIUM IODIDES
DESIGN
FAR ULTRAVIOLET RADIATION
GAS SCINTILLATION DETECTORS
PHOTOCATHODES
PHOTODETECTORS
RADIATION DETECTION