SPE analysis of high efficiency PMTs for the DEAP-3600 dark matter detector

被引：0
|
作者：
Olsen, Kevin [1 ]
Hallin, Aksel [1 ]
机构：
[1] Univ Alberta, Dept Phys, Edmonton, AB T6G 2G7, Canada
来源：
INTERNATIONAL NUCLEAR PHYSICS CONFERENCE 2010 (INPC2010): NEUTRINOS AND NUCLEI | 2011年 / 312卷
关键词：
SCINTILLATION;
D O I：
10.1088/1742-6596/312/7/072015
中图分类号：
O57 [原子核物理学、高能物理学];
学科分类号：
070202 ;
摘要：
The Dark matter Experiment using Argon Pulse-shape discrimination is a collaborative effort to develop a next-generation, tonne-scale dark matter detector at SNOLAB. The detector will feature a single-phase liquid argon (LAr) target surrounded by an array of 266 photomultiplier tubes (PMTs). A new high-efficiency Hamamatsu R877-100 PMT has been delivered to the University of Alberta for evaluation by the DEAP collaboration. The increase in efficiency could lead to a much greater light yield, but other experiments have reported a slower rise time [1],[2]. We have placed the PMT in a small dark box and had a base and preamplifier designed to be used with either an oscilloscope or a multi-channel analyzer. With this setup we have demonstrated the PMT's ability to distinguish single photo-electrons (SPE) and characterized the PMT by measuring the SPE pulse height spectrum, the peak-to-valley ratio, the dark pulse rate, the baseline, time resolution and SPE efficiency for varying the high voltage supplied to the PMT.
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页数：6
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