Manufacturing method of vacuum inner ultra-large quadrupole lens

Abstract

The invention discloses a method for manufacturing a vacuum inner ultra-large quadrupole lens, which comprises the steps of decomposing and designing the quadrupole lens into four magnet yokes and four magnetic poles, forging a blank, and performing heat treatment; processing a magnet yoke and a magnetic pole, and pre-assembling a lens iron core; carrying out disassembling and nickel plating; winding a semi-finished coil, and carrying out epoxy vacuum pouring to obtain a coil; disassembling the four nickel-plated parts, installing the coil, and assembling to obtain a quadrupole lens iron core;welding an end cover at one end of the vacuum pipeline with radiating strips; installing iron core water cooling pipes on two end surfaces of the quadrupole lens iron core; enabling the vacuum pipeline with the radiating strips to penetrate into a central hole of the quadrupole lens iron core, connecting an iron core water cooling pipe with a cooling water pipe on the end cover, and welding the other end cover; and enabling a coil wire outgoing line and the cooling water pipe on the end cover to sequentially penetrate into a transition section vacuum pipeline and a vacuum isolation pipeline to obtain the vacuum inner ultra-large quadrupole lens. According to the manufacturing method, the coil is isolated from the vacuum environment, the vacuum degree is not affected, and the performance of the ultra-large quadrupole lens in vacuum is improved.

Description

technical field [0001] The invention belongs to the technical field of ion beam focusing electromagnetic lens---super large quadrupole lens manufacturing new technology field, and relates to a manufacturing method of super large quadrupole lens in vacuum. Background technique [0002] Focusing or defocusing quadrupole lenses are a widely used magnet structure in particle accelerator magnet systems. It can make the ion beam suffer a certain Lorentz force when it passes through the magnetic channel formed by the four magnetic poles of the lens. Under the action of Lorentz force, the quadrupole lens is used to complete the function of focusing or defocusing the ion beam. The ultra-large quadrupole lens in the vacuum is placed in a vacuum of 1×10 -8 In the vacuum environment of Pa, the weight of the lens exceeds 9000kg, and the width and height of the iron core are more than 1.4 meters. The iron core is composed of four magnetic yokes and four corresponding magnetic poles. Th...

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Problems solved by technology

[0003] In the prior art, the manufacture of ordinary quadrupole lenses is very effective, but for the ultra-large quadrupole lenses in the vacuum environment, especially the quadrupole lenses are required to work in In a vacuum state, the outgassing rate of the coil is high, which seriously affects the vacuum degree of the large vacuum chamber. It is necessary to isolate the coil from the vacuum environment by a special method; in addition, for the ultra-large quadrupole lens, it is limited by weight and volume and The feasibility of coil assembly requires special processing techniques and methods

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