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Several types of MCP assemblies including 2-stage and 3-stage MCPs consist of 8Â¿m and 12Â¿m channel MCP having length to diameter ratio Â¿ of 40 and 60 are tested relating to the gain and pulse height resolution. The 2-stage assembly with Â¿=60 MCPs was incorporated in the proximity type MCP-PMT and showed capability to separate triple photon event clearly. Furthermore, 6Â¿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.
Date of Publication: Feb. 1985