Automatic expansion focusing electrode for photomultiplier and photomultiplier

Abstract

The invention discloses an automatic expansion focusing electrode and an automatic expansion focusing electrode-based photomultiplier. The photomultiplier comprises a high-vacuum seal shell, the automatic expansion focusing electrode, a high-quantum efficiency photocathode, an electronic multiplier system and a connection and lead system, wherein the high-vacuum seal shell has main functions of sealing and being used as a substrate for other films as a photomultiplier housing part; and the automatic expansion focusing electrode comprises a bottom plate, expansion blades and an automatic trigger mechanism as an electronic collector of the photomultiplier. The high-quantum efficiency photocathode is located in an upper area of the high-vacuum seal shell and converts incident photons into electrons. The electronic multiplier system is located at the lower part of the automatic expansion focusing electrode, amplifies the electrons collected by the focusing electrode and then leads out the electrons through the lead system. The automatic expansion focusing electrode touches the trigger mechanism in a photomultiplier packaging process, so that an expansion action of the automatic expansion focusing electrode is achieved and expansion of the radial size of the focusing electrode is achieved.

Description

technical field [0001] The invention relates to the technical field of microchannel plate photomultiplier tubes, in particular to an auto-expandable focusing set and photomultiplier tube for photomultiplier tubes. Background technique [0002] A photomultiplier tube is a light detector that converts a weak light signal into an electrical signal for output. From the category of multipliers, it can be divided into Dynapolar photomultiplier tubes and micro-channel plate photomultiplier tubes. Various types of photomultiplier tubes are widely used in basic physics research, high-energy gamma ray detection, ground cosmic ray telescope observation, double beta decay experiment, proton decay experiment, dark matter detection, neutrino detection experiment and other fields. [0003] Currently, photomultiplier tubes, especially large-sized photomultiplier tubes, are mostly dynode-type technical solutions. The structure of the whole tube is complex, and the time characteristic is rel...

AI Technical Summary

Problems solved by technology

[0003] Currently, photomultiplier tubes, especially large-sized photomultiplier tubes, are mostly dynode-type technical solutions, the structure of the whole tube is complex, and the time characteristic is relatively weak, while the micro-channel plate type photomultiplier tube has better time characteristics The focusing pole structure can further improve parameters such as TTS, but it is difficult to obtain greater collection efficiency due to various technical conditions, especially the size limit of the focusing set.

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