Production and performance measurement of multipurpose silica aerogel Cherenkov counter

We are developing a multi-purpose aerogel Cherenkov counter (M-ACC). M-ACC is a particle identification (PID) device which works in a narrow space and can cover large area with arbitrary shapes. It can also function in a magnetic field. M-ACC has a light guide comprising wavelength shifting fibers (WLSF), and its application is π/K identification in high-energy physics experiments, β-ray detection from radioisotope, and so on. We concretely propose a design of M-ACC for LEPS II project. We produced a prototype M-ACC, and measured the performance of it in the LEPS beam line.