... voltage after twice emission, many times multiplying and collecting by anode, which is widely applied to the fields of photon counting ... with the temperatures of 125.C and 150.C.The cathode sensitivitynormal temperatureof GDB30,GDB40 pipe is 9μA/1m,and ... GDB-21,GDB-38 pipe is 10μA/1m; The anode sensitivity(normal temperature) of GDB30GDB40 pipe is 30μA/1m ...