The CANDLES Trigger System for the Study of Double Beta Decay of 48Ca

被引：0
|
作者：
Maeda, T. [1 ]
Ajimura, S. [2 ]
Ichimura, K. [3 ]
Ishikawa, T. [1 ]
Nomachi, M. [2 ]
Ogawa, I. [4 ]
Saka, M. [1 ]
Seki, K. [1 ]
Sugaya, Y. [2 ]
Suzuki, K. [1 ]
Umehara, S. [2 ]
机构：
[1] Osaka Univ, Grad Sch Sci, Toyonaka, Osaka, Japan
[2] Osaka Univ, Nucl Phys Res Ctr, Ibaraki, Osaka, Japan
[3] Univ Tokyo, Inst Cosm Ray Res, Kamioka Observ, Kamioka, Gifu, Japan
[4] Univ Fukui, Grad Sch Engn, Fukui, Fukui, Japan
来源：
2014 19TH IEEE-NPSS REAL TIME CONFERENCE (RT) | 2014年
关键词：
D O I：
暂无
中图分类号：
TP3 [计算技术、计算机技术];
学科分类号：
0812 ;
摘要：
The CANDLES trigger system is used for the study of Double Beta Decay of Ca-48. The detector of this experiment consists of CaF2 crystals as the sources and the detectors, immersed in the liquid scintillator as a 4 pi active shield. Because the decay constant of liquid scintillator (similar to a few 10ns) is a few ten times shorter than that of CaF2 scintillator (similar to 1 mu s), if we trigger the signal by the pulse height, the energy threshold of liquid scintillator lights are a few ten times lower than CaF2's one. High counting rate of the liquid scintillator causes dead time. In order to avoid this problem, we have developed a Dual Gate Trigger. In this paper, we describe the trigger system of the CANDLES experiment and its performance.
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页数：4
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