Development of a low-alpha-emitting μ-PIC for NEWAGE direction-sensitive dark-matter search
arXiv:1707.09744 · doi:10.1063/1.5019004
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.
6 pages, 4 figures