Development of super-high sensitivity radon detector for the Super-Kamiokande detector

被引：35

作者：

Mitsuda, C

Kajita, T

Miyano, K

Moriyama, S

Nakahata, M

Takeuchi, Y ^{[1
]}

Tasaka, S

机构：

[1] Univ Tokyo, Kamioka Observ, Inst Cosm Ray Res, Gifu 5061205, Japan

[2] Univ Tokyo, Res Ctr Cosm Neutrinos, Inst Cosm Ray Res, Kashiwa, Chiba 2778582, Japan

[3] Gifu Univ, Dept Phys, Fac Educ, Gifu 5011193, Japan

[4] Niigata Univ, Dept Phys, Fac Sci, Niigata 9502181, Japan

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT | 2003年 / 497卷 / 2-3期

关键词：

radon; Super-Kamiokande; electrostatic collection; photodiode; membrane;

D O I：

10.1016/S0168-9002(02)01923-X

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

A super-high sensitivity radon detector for water which works as a real-time monitor of the radon concentration in water for the Super-Kamiokande detector was developed. Super-high sensitivity was achieved through the utilization of the membrane degassifier module, in addition to factors such as large detector volume, high electrostatic collection voltage, and high-quality electronics. As a result of the calibration study, a sensitivity of 14.6+/-2.1(stat. + syst.) (counts/day)/(mBq/m(3)) is achieved. The background level of the radon detector for water is 34.5+/-5.8(stat.) (counts/ day). This corresponds to the detection limit of 0.7 mBq/m3 in a one-day measurement. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：414 / 428

页数：15

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