NEWAGE is a direction-sensitive dark-matter-search experiment that uses a micro-patterned gaseous detector, or {mu}-PIC, as the readout. The main background sources are {alpha}-rays from radioactive contaminants in the {mu}-PIC. We have therefore developed a low-alpha-emitting {mu}-PICs and measured its performances. We measured the surface {alpha}-ray emission rate of the {mu}-PIC in the Kamioka mine using a surface {alpha}-ray counter based on a micro TPC.
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