Alkali source carrier and built-in alkaline source photomultiplier tube

Abstract

The invention provides an alkali source bearing device which comprises two fixed supports, a bar-shaped structure and an alkali source containing alkali metal potassium and cesium. A groove is formed in one end of each fixed support. The ends of the alkali source are matched with the grooves. One end of the alkali source extends into the groove of one fixed support, and the other end of the alkali source extends into the groove of the other fixed support. A gap is reserved between the ends, provided with the grooves, of the two fixed supports. A plurality of fixed units are arranged in the gap at intervals. The invention further provides a built-in alkali source type photomultiplier. The alkali source bearing device is sealed in a glass shell. After the alkali source bearing device is sealed in the built-in alkali source type photomultiplier, a vertical manufacturing mode can be adopted in the photoelectric surface manufacturing process without segmented type operation; by introducing potassium and cesium in sequence, the cleanliness in the glass shell can be better kept, it is avoided that impurities enter the shell to influence the performance of the photomultiplier, and the finished product rate is greatly increased; operation is easy, difficulty is greatly lowered in the manufacturing process, and production efficiency is improved.

Description

technical field [0001] The invention belongs to the field of vacuum electronic devices, relates to an alkali source carrier, and also relates to a built-in alkali source photomultiplier tube. Background technique [0002] In the traditional production process of side-window photomultiplier tubes, the photoelectric surface is made horizontally, and alkali metal potassium (K) is introduced at 210°C for reaction. After the required photoelectric effect is tested, the potassium (K) source is withdrawn. Bake at ℃ for half an hour; when the temperature is lowered to 190℃, cesium (Cs) is introduced, and after the required photoelectric effect is detected, the cesium source is withdrawn, and the remaining cesium is driven off by baking for half an hour. When this process introduces alkali source in the production process of the photoelectric surface, if impurities enter the tube, it will cause excessive leakage, affect the performance of the photomultiplier tube and even cause waste...

AI Technical Summary

Problems solved by technology

When this process introduces alkali source in the production process of the photoelectric surface, if impurities enter the tube, it will cause excessive leakage, affect the performance of the photomultiplier tube and even cause waste products. At the same time, this production process also has low production efficiency and high dark current of the product. , The electrical parameters of the tube are highly discrete, the yield is very low, and it is difficult to meet the demand

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