Development of a low-mass and high-efficiency charged-particle detector

D. Naito1∗, Y. Maeda1†, N. Kawasaki1, T. Masuda1‡, H. Nanjo1, T. Nomura2, M. Sasaki3 N. Sasao4, S. Seki1, K. Shiomi1§, Y. Tajima3 Department of Physics, Kyoto University, Kyoto 606-8502, Japan High Energy Accelerator Research Organization (KEK), Ibaraki 305-0801, Japan Department of Physics, Yamagata University, Yamagata 990-8560, Japan Research Core for Extreme Quantum World, Okayama University, Okayama 700-8530, Japan E-mail: d.naito@scphys.kyoto-u.ac.jp