The CANDLES trigger system for the study of Double Beta Decay of 48Ca

T. Maeda; S. Ajimura; K. Ichimura; T. Ishikawa; M. Nomachi; I. Ogawa; M. Saka; K. Seki; Y. Sugaya; K. Suzuki; S. Umehara

doi:10.1109/RTC.2014.7097421

The CANDLES trigger system for the study of Double Beta Decay of ⁴⁸Ca

T. Maeda, S. Ajimura, K. Ichimura, T. Ishikawa, M. Nomachi, I. Ogawa, M. Saka, K. Seki, Y. Sugaya, K. Suzuki, S. Umehara

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

The CANDLES trigger system is used for the study of Double Beta Decay of ⁴⁸Ca. The detector of this experiment consists of CaF₂ crystals as the sources and the detectors, immersed in the liquid scintillator as a 4π active shield. Because the decay constant of liquid scintillator (∼a few10ns) is a few ten times shorter than that of CaF₂ scintillator (∼1μs), 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.

Original language	English
Title of host publication	2014 19th IEEE-NPSS Real Time Conference, RT 2014 - Conference Records
Publisher	Institute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)	9781479936595
DOIs	https://doi.org/10.1109/RTC.2014.7097421
Publication status	Published - 2014
Externally published	Yes
Event	2014 19th IEEE-NPSS Real Time Conference, RT 2014 - Nara, Japan Duration: 2014 May 26 → 2014 May 30

Publication series

Name	2014 19th IEEE-NPSS Real Time Conference, RT 2014 - Conference Records

Conference

Conference	2014 19th IEEE-NPSS Real Time Conference, RT 2014
Country/Territory	Japan
City	Nara
Period	14/5/26 → 14/5/30

ASJC Scopus subject areas

Computational Theory and Mathematics
Computer Networks and Communications
Software
Electrical and Electronic Engineering
Information Systems

Access to Document

10.1109/RTC.2014.7097421

Cite this

Maeda, T., Ajimura, S., Ichimura, K., Ishikawa, T., Nomachi, M., Ogawa, I., Saka, M., Seki, K., Sugaya, Y., Suzuki, K., & Umehara, S. (2014). The CANDLES trigger system for the study of Double Beta Decay of ⁴⁸Ca. In 2014 19th IEEE-NPSS Real Time Conference, RT 2014 - Conference Records [7097421] (2014 19th IEEE-NPSS Real Time Conference, RT 2014 - Conference Records). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/RTC.2014.7097421

The CANDLES trigger system for the study of Double Beta Decay of ⁴⁸Ca. / Maeda, T.; Ajimura, S.; Ichimura, K. et al.
2014 19th IEEE-NPSS Real Time Conference, RT 2014 - Conference Records. Institute of Electrical and Electronics Engineers Inc., 2014. 7097421 (2014 19th IEEE-NPSS Real Time Conference, RT 2014 - Conference Records).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Maeda, T, Ajimura, S, Ichimura, K, Ishikawa, T, Nomachi, M, Ogawa, I, Saka, M, Seki, K, Sugaya, Y, Suzuki, K & Umehara, S 2014, The CANDLES trigger system for the study of Double Beta Decay of ⁴⁸Ca. in 2014 19th IEEE-NPSS Real Time Conference, RT 2014 - Conference Records., 7097421, 2014 19th IEEE-NPSS Real Time Conference, RT 2014 - Conference Records, Institute of Electrical and Electronics Engineers Inc., 2014 19th IEEE-NPSS Real Time Conference, RT 2014, Nara, Japan, 14/5/26. https://doi.org/10.1109/RTC.2014.7097421

Maeda T, Ajimura S, Ichimura K, Ishikawa T, Nomachi M, Ogawa I et al. The CANDLES trigger system for the study of Double Beta Decay of ⁴⁸Ca. In 2014 19th IEEE-NPSS Real Time Conference, RT 2014 - Conference Records. Institute of Electrical and Electronics Engineers Inc. 2014. 7097421. (2014 19th IEEE-NPSS Real Time Conference, RT 2014 - Conference Records). doi: 10.1109/RTC.2014.7097421

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abstract = "The CANDLES trigger system is used for the study of Double Beta Decay of 48Ca. The detector of this experiment consists of CaF2 crystals as the sources and the detectors, immersed in the liquid scintillator as a 4π active shield. Because the decay constant of liquid scintillator (∼a few10ns) is a few ten times shorter than that of CaF2 scintillator (∼1μs), 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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