Development of a low-$\alpha$-emitting $\mu$-PIC as a readout device for direction-sensitive dark matter detectors

Abstract

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), $\alpha$-rays emitted from the detector components often create substantial radioactive backgrounds. Based on the study of the background of NEWAGE, a new detector "low-$\alpha$ $\mu$-PIC" is developed. The produced $\mu$-PIC performs well as a gas detector and the $\alpha$-ray emission rate from the $\mu$-PIC reduced by a factor of 100.

References in corpus (14)

• Planck 2013 results. XVI. Cosmological parameters
• Supersymmetric Dark Matter
• Results from a search for dark matter in the complete LUX exposure
• Dark Matter Results from 225 Live Days of XENON100 Data
• Dark Matter Results From 54-Ton-Day Exposure of PandaX-II Experiment
• A Search for WIMPs with the First Five-Tower Data from CDMS
• First model independent results from DAMA/LIBRA-phase2
• The case for a directional dark matter detector and the status of current experimental efforts
• Can WIMP Spin Dependent Couplings explain DAMA data, in light of Null Results from Other Experiments?
• Readout technologies for directional WIMP Dark Matter detection
• First Dark Matter Search Results from a Surface Run of the 10-L DMTPC Directional Dark Matter Detector
• Identification of ${}^{210}$Pb and ${}^{210}$Po in the bulk of copper samples with a low-background alpha particle counter
• MIMAC : A micro-tpc matrix for directional detection of dark matter
• Development of low radioactivity photomultiplier tubes for the XMASS-I detector

Cited by in corpus (5)

• Development of highly radiopure NaI(Tl) scintillator for PICOLON dark matter search project
• Review on dark matter searches
• Discovering supernova-produced dark matter with directional detectors
• The role of small scale experiments in the direct detection of dark matter
• Direction-sensitive dark matter search with a low-background gaseous detector NEWAGE-0.3b''