Manufacturing method of thin-wall radio frequency superconducting cavity

Abstract

The invention discloses a manufacturing method of a thin-wall radio frequency superconducting cavity, which is characterized in that a niobium circular plate with the diameter of 275 mm and the thickness of 1 mm is adopted for three-time stamping manufacturing, so that the heat conduction effect can be improved, the flowing distance of a plate material can be reduced, and the risks of wrinkling and tearing of the plate material in the stamping process can be reduced. Three sealing grooves are machined in the flange, and the niobium pipe is formed by rolling, welding and machining a niobium plate with the thickness of 1 mm. The method comprises the following steps: heating a flange to 80 DEG C, cooling a niobium pipe to-70 DEG C, preserving heat for 30 minutes, assembling, heating to 1060 DEG C in a vacuum environment after assembling, welding the flange and the niobium pipe, embedding oxygen-free copper wires in three sealing grooves in the flange, ensuring seamless matching of the flange and the niobium pipe, forming a capillary suction phenomenon, filling a gap between the flange and the niobium pipe with the oxygen-free copper, and sealing the niobium pipe. And cooling to room temperature, taking out, and performing oil-free cleaning to obtain the thin-wall radio frequency superconducting cavity. Therefore, the risk of low-temperature quenching can be effectively reduced, and the heat conduction performance of the radio frequency superconducting cavity is improved.

Description

Technical field [0001] The present application relates to the field of radiofrequency supercoding cavity processing, and more particularly to a method for producing a thin-walled overall supercoder. Background technique [0002] RF super guide cavity is an important part of the particle superconductance accelerator, the manufacturing process is complex, the low temperature operating conditions are high, due to the hemanthromium superconducting transition temperature of 9.28K, so the particle accelerator uses the frequent supercodes manufactured by the bony material, Operation in the liquid helium. The main factors that limit the radiofrequency supercodable acceleration gradient are thermal loss and field emissions, and the thermal loss is mainly from defects in the superconductor. Under radio frequency conditions, the RF current passes through the defects and generates Joule heat, when the edge of the defect The temperature exceeds the superconducting transition temperature, the ...

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Problems solved by technology

[0004] This application provides a method for manufacturing a thin-walled radio frequency superconducting cavity, which solves the problems of low thermal conductivity and high risk of quenching at low temperature in the traditional radio frequency superconducting cavity manufacturing method in the prior art

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