Self-expanding focusing electrode and photomultiplier tube for photomultiplier tube

Abstract

The invention discloses an automatic expansion focusing electrode and a photomultiplier tube based on the automatic expansion focusing electrode. The photomultiplier tube includes a high-vacuum sealed shell, an auto-expandable focusing electrode, a photocathode with high quantum efficiency, an electron multiplication system, a connection and a lead system. The high-vacuum sealed casing as the outer shell of the photomultiplier tube is mainly used for sealing and as the base of other film layers. The self-expanding focusing electrode is used as the electron collector of the photomultiplier tube, including the bottom plate, expansion blades and automatic triggering mechanism. A high quantum efficiency photocathode is located in the upper region of the high vacuum sealed enclosure and converts incident photons into electrons. The electron multiplication system is located under the self-expanding focusing pole, which amplifies the electrons collected by the focusing pole and leads them out through the lead system. During the packaging process of the photomultiplier tube, the auto-expanding focusing pole will trigger the trigger mechanism, so as to realize the expansion action of the auto-expanding focusing pole and realize the enlargement of the radial dimension of the focusing pole.

Description

technical field [0001] The invention relates to the technical field of microchannel plate photomultiplier tubes, in particular to an auto-expandable focusing electrode and a 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 characteristi...

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. 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 pole.

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