Double focusing electrode for photomultiplier tube and photomultiplier tube

Abstract

The present invention provides a double focusing electrode for a photomultiplier tube and a photomultiplier tube. The double focusing electrode comprises a bowl-shaped auto-expanding focusing electrode and a secondary focusing electrode. The bowl-shaped auto-expanding focusing electrode comprises an annular bottom plate and a rotating shaft, a curved blade, a torsion spring and a triggering devicearranged on the bottom plate. The secondary focusing electrode is an annular metal electrode fixed on the annular bottom plate. An insulating component is arranged between the secondary focusing electrode and the bottom plate for forming insulation between the secondary focusing electrode and the bowl-shaped focusing electrode composed by the curved blade. An electrical connection plate is further connected with the secondary focusing electrode. The electrical connection plate passes through the insulating component and the bottom plate, extends below the bottom plate to lead the secondary focusing electrode out and electrically connected with the lead system of the photomultiplier tube. Through the implementation of the present invention, the photoelectron collection and detection efficiency can be improved.

Description

Technical field [0001] The invention relates to the technical field of a microchannel plate type photomultiplier tube, in particular to a double focusing electrode and a photomultiplier tube used for the photomultiplier tube. Background technique [0002] The photomultiplier tube is a kind of light detector, which can convert the weak light signal into electrical signal output. From the multiplier category, it can be divided into dynode photomultiplier tube and microchannel plate type photomultiplier tube. Various types of photomultiplier tubes are widely used in basic physics research, high-energy gamma-ray detection, ground-based cosmic ray telescope observation, double beta decay experiment, proton decay experiment, dark matter detection, neutrino detection experiment and other fields. [0003] At present, most of the technical solutions adopted by photomultiplier tubes, especially large-size photomultipliers, are the dynode type, the entire tube structure is complex, and the t...

AI Technical Summary

Problems solved by technology

[0003] At present, 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 structure can further improve parameters such as TTS, but it is difficult to obtain a greater collection efficiency due to technical limitations in various aspects, especially the structural limitations of the focusing pole.

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