| abstract |
The invention belongs to the technical field of photomultiplier tubes, and particularly relates to a photocathode for a photomultiplier tube and a preparation method thereof. The invention provides a photocathode for a photomultiplier, which takes copper-beryllium alloy as a supporting substrate, Be 2 N 3 The film being a photoelectron-reflecting layer, K 2 The CsSb film is a photoelectron emitting layer, and the problems of low quantum efficiency, poor stability and high noise of the photocathode material in the prior art are solved. |