Low pressure gas study for a direction-sensitive dark matter search experiment with MPGD
Low pressure gas study for a direction-sensitive dark matter search experiment with MPGD
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DOI：
10.1088/1748-0221/7/02/c02023
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发表时间：
2012-02
影响因子：
1.3
通讯作者：
K. Nakamura;K. Miuchi;S. Iwaki;H. Kubo;T. Mizumoto;H. Nishimura;J. Parker;T. Sawano;A. Takada;T. Tanimori;H. Sekiya;A. Takeda
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文献类型：
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作者：
K. Nakamura;K. Miuchi;S. Iwaki;H. Kubo;T. Mizumoto;H. Nishimura;J. Parker;T. Sawano;A. Takada;T. Tanimori;H. Sekiya;A. Takeda
NEWAGE项目（使用先进气体径迹探测装置实验进行新一代弱相互作用大质量粒子搜索）是一个方向敏感的暗物质搜索实验，通过核反冲来寻找弱相互作用大质量粒子（WIMPs）。NEWAGE探测器是一种读出间距为400μm的微型时间投影室，可探测三维核径迹。为了降低能量阈值（这是对下次地下测量最有效的改进之一），进行了一项低压气体研究（76托）。我们测量了气体增益、角分辨率和探测效率。通过降低气体压力，我们最终将能量阈值从100keV降低到了50keV。
The NEWAGE project (NEw generation WIMP search with an Advanced Gaseous tracking device Experiment) is a direction-sensitive dark matter search experiment, searching for WIMPs (Weakly Interacting Massive Particle) via nuclear recoil. The NEWAGE detector, a micro time-projection-chamber with a 400μm pitch read out, detects three-dimensional nuclear tracks. A low-pressure gas study (76 torr) was performed in order to lower the energy threshold, one of the most effective improvements for the next underground measurement. We measured the gas gain, the angular resolution and the detection efficiency. We have consequently lowered the energy threshold from 100 keV to 50 keV by decreasing the gas pressure.