Photomultiplier end window structure

Abstract

The invention provides a photomultiplier end window structure which comprises a photomultiplier, an incident light window clamping cover is fixedly mounted at the light inlet end of the photomultiplier, an incident light window mounting groove is formed in the incident light window clamping cover, an inner ring of a ball bearing is in interference fit with the photomultiplier. A telescopic groove and the incident light window mounting groove are located in the same plane, air pressure telescopic rods are fixedly mounted at the ends, away from the incident light window clamping cover, of the N telescopic grooves correspondingly, and the annular air supply groove communicates with an external air pump through an air inlet and outlet hole formed in the light window mounting table. A matching groove is formed in the side, located in the movable path of the closing rod, of the end window base. According to the invention, a plurality of light windows are arranged, when a specific photon wavelength needs to be detected, the corresponding light windows can be rapidly replaced, and meanwhile, the use of the sealing rod and the matching groove ensures the accurate matching of the light windows and incident light window mounting grooves, and meanwhile, the other pneumatic telescopic rods are not influenced by air pressure.

Description

technical field [0001] The invention relates to the technical field of photomultiplier devices, in particular to a photomultiplier tube end window structure. Background technique [0002] The photomultiplier tube is a vacuum electronic device that converts weak light signals into electrical signals. The photomultiplier tube is used in optical measuring instruments and spectral analysis instruments. Radiation power, the development of laser detection instruments is closely related to the use of photomultiplier tubes as effective receivers. The launch and image transmission of TV movies are also inseparable from photomultiplier tubes. Photomultiplier tubes are widely used in metallurgy, electronics, machinery, and chemical industry. , geology, medicine, nuclear industry, astronomy and space research and other fields. [0003] A split-type crystal end window receiver with the application number "CN201921283009.2" in the prior art includes a crystal assembly, an outer cylinder ...

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Problems solved by technology

[0004] However, the above-mentioned split crystal end window receiver still has obvious defects during use: since each light window glass has its light transmittance to a specific photon wavelength, when it is necessary to detect a specific photon wavelength, It is necessary to select the corresponding light window glass, but the light window glass of the above-mentioned device is a fixed structure, which needs to be replaced in advance during use. When different photon wavelengths need to be detected, the light window needs to be replaced frequently, which causes serious problems There is a certain window period, and the replacement process is cumbersome

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