A New Electrostatically-focused UV HPD for Liquid Xenon

Cushman, Priscilla Brooks¹ 

[1] University of Minnesota

关键词: Photodetectors;    hybrid photodiode;    dark matter;    UV photodetection;   

DOI  :  10.2172/1087130
RP-ID  :  DE-FG01-05ER05-27 - Final Report
PID  :  OSTI ID: 1087130

美国|英语

来源: SciTech Connect

【 摘 要 】

Appropriate photodetectors are a major challenge for liquid xenon technology as proposed by the next generation of double beta decay, solar neutrino, and dark matter searches. The primary photon signal is tiny and in the hard ultraviolet, the installation is cryogenic, and the sensors themselves must not introduce background. Hybrid photodiodes (HPDs) provide an easy substitute for a conventional PMT with the added advantages of low radioactivity, better area coverage, and single photoelectron counting. A computer-controlled test setup capable of characterizing optical properties of ultraviolet photodetectors was installed. It was used to compare photomultiplier tubes, silicon photomultipliers, avalanche photodiodes, and a novel-design custom HPD developed by the DEP company under this proposal.