PHOTOMULTIPLIER OF ELECTROSTATIC FOCUSING MICRO-CHANNEL PLATES

摘要

Disclosed is a photomultiplier of electrostatic focusing micro-channel plates. The photomultiplier comprises a photocathode, an electron multiplier, an anode, a focusing electrode, a power supply electrode and a support post supporting the focusing electrode, the electron multiplier and the anode; the focusing electrode, the electron multiplier and the anode are arranged in a glass vacuum container, and a signal lead of the anode and the power supply electrode penetrate through the glass vacuum container to be connected with an external circuit. The photomultiplier is characterized in that the focusing electrode, the electron multiplier and the anode are centrally coaxial; the electron multiplier consists of two pairs of micro-channel plates arranged in parallel and having a certain gap therebetween. Compared with the prior art, high gains and good single photoelectron spectra are realized by independently regulating the voltages of micro-channel plate assemblies at all levels.