An Ultra-Cryogenic Beam Position Detector with Al-Mg Alloy Seal

Abstract

The invention provides an ultralow temperature beam position detector with an aluminum magnesium alloy sealing ring. The ultralow temperature beam position detector with the aluminum magnesium alloy sealing ring is that one side is connected with a corrugated pipe, and while the other end is connected with a vacuum aluminum magnesium alloy sealing ring flange; one end of the corrugated pipe is connected with the vacuum aluminum magnesium alloy sealing ring flange; the vacuum aluminum magnesium alloy sealing ring flange comprises a convex flange and a concave flange which are positioned at the connecting part of a pipe joint; the aluminum alloy sealing ring is arranged at the part in which the convex flange is connected with the concave flange; a sealing ring body is circular, and the section of the sealing ring body is regular hexagonal; two sealing knife edges which are linear knife edges are arranged on the sealing ring and positioned at the diagonal angles of two ends of the sealing ring body, wherein the two sealing knife edges are axially symmetrically distributed based on the section of the sealing ring body as a reference surface. According to the ultralow temperature beam position detector with the aluminum magnesium alloy sealing ring, the ultra-vacuum aluminum magnesium alloy sealing ring and the supporting flanges are assembled, and the work can be performed under an ultralow temperature (working temperature is 273 DEG C below zero), so that the low temperature resisting effect can be greatly improved.

Description

technical field [0001] The invention relates to an ultra-low temperature beam current position detector with an ultra-low temperature and ultra-vacuum aluminum-magnesium alloy sealing ring, and the connection and sealing between the beam current position detectors of vacuum components under the ultra-low temperature and ultra-vacuum working environment. Background technique [0002] At present, BPM (beam position detector) flanges all adopt ultra-high vacuum flanges. There are three types of ultra-high vacuum flanges, which are internal welding type, loose sleeve type and blind type, and are sealed with copper seals. And this kind of flange has a common feature, the sealing knife edge is on the flange, the sealing knife edge of the flange is not allowed to have bruises, scratches, spots and other defects that affect the vacuum sealing performance, the material of the commonly used metal sealing ring There are two kinds of gold wire and oxygen-free copper, and they have the f...

AI Technical Summary

Problems solved by technology

The disadvantage is that the part in contact with the atmosphere will be oxidized during high-temperature baking. Therefore, in the case of high requirements, the surface of the oxygen-free copper sealing ring is plated with gold to make it have better sealing performance.

Its low temperature resistance is not good

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