Tracking performance of the NEWAGE-0.3a direction-sensitive dark matter detector

被引:11
作者
Nishimura, Hironobu [1 ]
Miuchi, Kentaro [1 ]
Hattori, Kaori [1 ]
Iwaki, Satoru [1 ]
Ida, Chihiro [1 ]
Kabuki, Shigeto [1 ]
Kubo, Hidetoshi [1 ]
Kurosawa, Shunsuke [1 ]
Sekiya, Hiroyuki [2 ]
Takada, Atsushi [3 ]
Takahashi, Michiaki [1 ]
Takeda, Atsushi [2 ]
Tanimori, Toru [1 ]
Tsuchiya, Ken'ichi [1 ]
Ueno, Kazuki [1 ]
机构
[1] Kyoto Univ, Grad Sch Sci, Dept Phys, Sakyo Ku, Kyoto 6068502, Japan
[2] Univ Tokyo, ICRR, Kamioka Observ, Hida, Gifu 5061205, Japan
[3] ISAS JAXA, Sci Balloon Lab, Sagamihara, Kanagawa 2298510, Japan
关键词
Dark matter; Direction-sensitive; WIMP; Time projection chamber; SEARCH; LIMITS; MODULATION; CHAMBER;
D O I
10.1016/j.astropartphys.2008.12.011
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
NEWAGE-0.3a is a prototype direction-sensitive dark matter search detector. We measured its response to electron tracks and nuclear tracks while focusing on the tracking performances in an underground laboratory. It showed a gamma-ray rejection power of 8.1 +/- 1.9 X 10(-6) at 100 keV alpha e.(alpha-equivalent) and an energy resolutions of 45% at 6 MeV alpha.e. The absolute nuclear efficiency was 80% at 100 keV alpha.e. and the nuclear directional-dependent efficiency was also measured. The three-dimensional angular resolution for the nuclear track was 46 +/- 3 degrees in the energy range from 100 keV alpha.e. to 400 keV alpha.e. (C) 2009 Elsevier B.V. All rights reserved.
引用
收藏
页码:185 / 191
页数:7
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