Speaker
Description
NEWAGE is the experiment of direction-sensitive dark matter search using low pressure gaseous TPC with micro pattern strip readout (μ-PIC). It allows to measure the distribution of angles of WIMP-nuclear recoil by track reconstruction, and it leads a positive signature of dark matter. In recent years, large size (~1 m3) TPC filled with SF6 gas, which is so called “negative-ion gas”, is under development. A TPC with negative- ion is a novel technology for the measurement of absolute position of drift direction coordinates for self- triggering systems. It enables to reduce backgrounds coming from detector surface. Furthermore, diffusion of negative-ion drift is expected to be lower than that of nominal electron drift, which allows to improve angular resolution. This presentation reports the status of the development of negative-ion gaseous TPC with prototype small chamber. In addition, we started to develop O(100) μm pitch gaseous TPC detector with pixel type readout system to achieve reconstruction of short track nuclear recoils with good angular resolution. It enables to explore lower mass region of direction-sensitive dark matter searches. We also report about the status of the pixel detector development.
