Characteristics of the Newly Developed MCP and Its Assembly

Several types of MCP assemblies including 2-stage and 3-stage MCPs consist of 8¿m and 12¿m channel MCP having length to diameter ratio ¿ of 40 and 60 are tested relating to the gain and pulse height resolution. The 2-stage assembly with ¿=60 MCPs was incorporated in the proximity type MCP-PMT and showed capability to separate triple photon event clearly. Furthermore, 6¿m channel MCPs in 2-stage was tested in PMT configuration and showed drastic improvement of timing property. As for the life, new MCP showed residual gain of more than 50% at the accumulated output charge of 0.1 C/cm2.