-50) TIME (0.2 ns / Div.) THBV4_1107EAa THBV4_1107EAb Accurate T.T.S. measurement of MCP-PMT (R3809U-50)t using MCP-PMT (R3809U-50) To evaluate the T.T.S. of an MCP-PMT more accurately, the measurement system shown in Figure 11-8 was used and data of 25.0 picoseconds