Development of a low alpha emitting μ-PIC for NEWAGE direction-sensitive dark matter search
- Mr. takashi HASHIMOTO
- Mr. takashi HASHIMOTO (Kobe Univ.)
The NEWAGE detector is a gaseous micro-TPC using μ-PIC. We found the main background sources are alpha rays from the radioactive contaminations in the μ-PIC. So, low alpha emitting μ-PICs have been developed. The performance of these μ-PICs will be presented. We set up a surface alpha ray counter using micro TPC in Kamioka mine. We measured surface alpha ray emission rate of the μ-PIC. The result will be presented.