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Sealing method for cesium foam of cesium-beam tube

A useful, cesium beam technology, used in welding equipment, metal processing equipment, manufacturing tools, etc., to achieve the effects of easy implementation, enhanced sealing effect, and improved yield

Active Publication Date: 2014-12-24
LANZHOU INST OF PHYSICS CHINESE ACADEMY OF SPACE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of this, the present invention provides a cesium bubble sealing method for a cesium beam tube, which can better solve the problem of sealing a cesium beam tube with a metal cesium bubble, improve the sealing effect of the cesium bubble seal, and the steps are simple and easy to implement

Method used

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  • Sealing method for cesium foam of cesium-beam tube
  • Sealing method for cesium foam of cesium-beam tube
  • Sealing method for cesium foam of cesium-beam tube

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[0028] First, replace the cutter head of the hydraulic pliers with a flat cutter head. The long side of the rectangular surface of the cutter head is 50mm, and the short side is 10mm. Squeeze the cesium-filled tube near the root of the cesium-filled tube at a distance of 2-3 mm from the cesium bubble. The maximum pressure of the hydraulic clamp is 5 MPa to ensure that the width of the flattened part does not exceed 5 mm. This is the internal structure of the cesium furnace for the size of the flattened part. The basic requirements of different cesium furnace structures can be different. Replace the cutter head of the hydraulic pliers with a cold welding cutter head, and cut the cesium-filled tube at a place 5-7 mm from the root of the cesium-filled tube at the flattened part, forming a sealed knife edge at the cut-off point, see image 3 At this time, the maximum pressure of the hydraulic clamp is 35MPa, hold it for 10 seconds and release the hydraulic clamp. Replace the weld...

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Abstract

The invention discloses a sealing method for cesium foam of a cesium-beam tube. According to the sealing method provided by the invention, the sealing problem of metal cesium foam of the cesium-beam tube is effectively solved, the sealing effect at a cesium foam position is increased, the step is simple and the method is easily realized. According to the invention, a three-sealing mode is adopted, so that the sealing effect of the cesium foam position is greatly enhanced. Firstly, a cesium-filled pipe wall is flattened, the stress possibly generated at a cutter opening is eliminated and air is prevented from entering into the cesium foam so that the metal cesium is prevented from being polluted; the cesium foam is cut off at a flattened part and the cutter opening is formed, and then the cesium foam is sealed for the first time; the flattened part is spot-welded, the pipe wall is fused, a sealing effect is achieved, and the sealing effect is prevented from being influenced by the steam cesium sprayed in the cesium foam under high temperature when the cutter opening is welded, so that the sealing is performed for the second time; lastly, the cutter opening is tiny arc-welded and the cutter opening is firmly sealed, so that the sealing is performed for the third time. Through the three times of sealing, the sealing effect is better.

Description

technical field [0001] The invention relates to the technical field of manufacturing small cesium atomic clocks, in particular to a sealing method for cesium bubbles used in cesium beam tubes. Background technique [0002] The cesium beam tube is the core component of the cesium atomic clock. It consists of four parts: atom preparation, state selection, quantum transition and signal output. The atom preparation part is the cesium furnace, which is composed of cesium bubbles, collimators, labyrinth structures, heating rods, etc. , high-purity metallic cesium loaded in cesium bubbles. The cesium bubble is cylindrical in shape, with a diameter of 10-15 mm and a height of 25-35 mm. One end is connected with a cesium-filled tube with a diameter of about 3 mm. The material is stainless steel or a valve, such as figure 1 shown. [0003] When preparing cesium bubbles, first connect the cesium bubbles to the glass vacuum system through the cesium-filled tubes, then fill the cesium ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K31/02
CPCB23K31/02B23P15/00
Inventor 陈江马寅光王骥张涤新李得天刘志栋袁征难朱宏伟成大鹏黄良育郑宁高玮
Owner LANZHOU INST OF PHYSICS CHINESE ACADEMY OF SPACE TECH
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