Development of a low-α-emitting μ-PIC as a readout device for direction-sensitive dark matter detectors

Takashi Hashimoto*, Kentaro Miuchi, Tomonori Ikeda, Hirohisa Ishiura, Kiseki D. Nakamura, Hiroshi Ito, Koichi Ichimura, Ko Abe, Kazuyoshi Kobayashi, Atsushi Takada, Atsuhiko Ochi, Takuma Nakamura, Takuya Shimada

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)


Direction sensitivity could provide robust evidence for the direct detection of weakly interacting massive particles constituting dark matter. However, the sensitivity of this method remains low due to the radioactive backgrounds. The purpose of this study is to develop a low-background detector as a two-dimensional imaging device for a gaseous time projection chamber. In direction-sensitive dark matter experiments (e.g. NEWAGE), α-rays emitted from the detector components often create substantial radioactive backgrounds. Based on the study of the background of NEWAGE, a new detector “low-αμ-PIC” is developed. The produced μ-PIC performs well as a gas detector and the α-ray emission rate from the μ-PIC reduced by a factor of 100.

Original languageEnglish
Article number164285
JournalNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Publication statusPublished - 2020 Oct 11
Externally publishedYes


  • Gaseous detector
  • Micro-pattern detector
  • μ-PIC

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Instrumentation


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