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arXiv · 1707.09744

Development of a low-alpha-emitting μ-PIC for NEWAGE direction-sensitive dark-matter search

Takashi Hashimoto·Kentaro Miuchi·Kiseki Nakamura·Ryota Yakabe·Tomonori Ikeda·Ryosuke Taishaku·Miki Nakazawa·Hirohisa Ishiura·Atsuhiko Ochi·Yasuo Takeuchi
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Abstract

NEWAGE is a direction-sensitive dark-matter-search experiment that uses a micro-patterned gaseous detector, or μ-PIC, as the readout. The main background sources are α-rays from radioactive contaminants in the μ-PIC. We have therefore developed a low-alpha-emitting μ-PICs and measured its performances. We measured the surface α-ray emission rate of the μ-PIC in the Kamioka mine using a surface α-ray counter based on a micro TPC.

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Takashi Hashimoto, Kentaro Miuchi, Kiseki Nakamura, Ryota Yakabe, Tomonori Ikeda, Ryosuke Taishaku, Miki Nakazawa, Hirohisa Ishiura, Atsuhiko Ochi, Yasuo Takeuchi. 2017-07-31. Development of a low-alpha-emitting μ-PIC for NEWAGE direction-sensitive dark-matter search. https://doi.org/10.1063/1.5019004

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