Pumping speed limiting method and device in fabrication of negative electrode of photomultiplier

A technology for photomultiplier tubes and cathodes, which is applied to electrode devices of multiple dynodes, manufacturing of light-emitting cathodes, manufacturing of secondary emitter electrodes, etc., can solve the problems of high price and difficult cleaning, and achieves convenient operation, low cost, and low cost. Effects of Environmental Pollution

Inactive Publication Date: 2017-01-04
山东东仪光电仪器有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] Vacuum flow limiting valves on the market are mostly made of metal, and the price is relatively high. It is not easy to clean after being contaminated by alkali metals, and due to the dynamic seal, it has a certain air leakage rate.

Method used

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  • Pumping speed limiting method and device in fabrication of negative electrode of photomultiplier
  • Pumping speed limiting method and device in fabrication of negative electrode of photomultiplier
  • Pumping speed limiting method and device in fabrication of negative electrode of photomultiplier

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Embodiment Construction

[0037] The present invention is described in detail below with reference to accompanying drawing and embodiment:

[0038] attached Figure 1-3 It can be seen that a limiting pumping speed device in the manufacture of the cathode of a photomultiplier tube comprises: a photomultiplier tube 9 and a vacuum tube 1, the photomultiplier tube is connected with one end of the vacuum tube 1 through a connecting tube 2; the other end of the vacuum tube 1 is connected to the vacuum tube 1 The devices are connected; a horizontal glass tube 3 is arranged between the connecting pipe 2 and the vacuum tube 1; the axis of the horizontal glass tube 3 is perpendicular to the axis of the vacuum tube 1; the horizontal glass tube 3 is provided with an air inlet for sealing the vacuum tube 1 The slider 4; the outside of the transverse glass tube 3 is provided with an electromagnet 5.

[0039] The diameter of the transverse glass tube is 20mm.

[0040] The slide block is a columnar slide block; the ...

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Abstract

The invention relates to a pumping speed limiting method and device in fabrication of a negative electrode of a photomultiplier. The pumping speed limiting device comprises a photomultiplier and a vacuum pumping tube, wherein the photomultiplier is connected with one end of the vacuum pumping tube by a connection tube, the other end of the vacuum pumping tube is connected with a vacuum pumping device, a horizontal glass tube is arranged between the connection tube and the vacuum pumping tube and is perpendicular to the axis of the vacuum pumping tube, a sliding block is arranged in the horizontal glass tube and is used for sealing an air inlet of the vacuum pumping tube. By the pumping speed limiting device in fabrication of the negative electrode of the photomultiplier, alkali metal loss is effectively limited, the vacuum degree during the fabrication process and the vacuum degree in a finished tube cannot be affected, and the pumping speed limiting device is low in cost and is convenient to operate and simple to maintain.

Description

technical field [0001] The invention relates to a photomultiplier tube manufacturing device, in particular to a pumping speed limiting device in the photomultiplier tube cathode manufacturing. Background technique [0002] The photomultiplier tube consists of a photocathode, a multiplication system and an anode, and is usually packaged in a glass shell, which is a high vacuum environment. At present, the most widely used photocathode is the compound cathode formed by alkali metals such as sodium, potassium, cesium, rubidium and other materials. Since these simple alkali metals can react violently with air, alkali metals are used in the manufacture of photocathode The salt and reducing agent are mixed and heated in a vacuum to obtain a simple base, and then react with other materials at a certain temperature to form a photocathode. [0003] There are two objective facts in this photocathode manufacturing process: [0004] 1. A vacuum system with high pumping speed is requir...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01J9/12H01J43/20
CPCH01J9/125H01J43/20
Inventor 赵珍阳全建银
Owner 山东东仪光电仪器有限公司
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