Author/Authors :
Nishimura، نويسنده , , Hironobu and Miuchi، نويسنده , , Kentaro and Hattori، نويسنده , , Kaori and Iwaki، نويسنده , , Satoru and Ida، نويسنده , , Chihiro and Kabuki، نويسنده , , Shigeto and Kubo، نويسنده , , Hidetoshi and Kurosawa، نويسنده , , Shunsuke and Sekiya، نويسنده , , Hiroyuki and Takada، نويسنده , , Atsushi and Takahashi، نويسنده , , Michiaki and Takeda، نويسنده , , Atsushi and Tanimori، نويسنده , , Toru and Tsuchiya، نويسنده , , Ken’ichi and Ueno، نويسنده , , Kazuki، نويسنده ,
Abstract :
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 × 10−6 at 100 keV α.e.(alpha-equivalent) and an energy resolutions of 45% at 6 MeV α.e. The absolute nuclear efficiency was 80% at 100 keV α.e. and the nuclear directional-dependent efficiency was also measured. The three-dimensional angular resolution for the nuclear track was 46 ± 3° in the energy range from 100 keV α.e. to 400 keV α.e.
Keywords :
Dark matter , Time projection chamber , Direction-sensitive , WIMP
