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Medium-temperature annealing method for superconducting cavity

A superconducting cavity and high-temperature annealing technology, which is applied in the direction of accelerators and electrical components, can solve problems such as complex processes, achieve low process complexity, save cost and operating costs, and reduce power consumption.

Active Publication Date: 2020-10-20
INST OF HIGH ENERGY PHYSICS CHINESE ACADEMY OF SCI
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Problems solved by technology

[0004] With the development and progress of related technologies, the current surface resistance (Rs) of the superconducting cavity is close to the limit of the traditional BCS superconducting theory, it is difficult to continue to reduce, and the process is complicated

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  • Medium-temperature annealing method for superconducting cavity
  • Medium-temperature annealing method for superconducting cavity
  • Medium-temperature annealing method for superconducting cavity

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Embodiment Construction

[0028] In order to better illustrate the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0029] Process flow of the present invention such as figure 2 As shown, the following combination figure 2 The medium temperature annealing technology of this superconducting cavity is introduced in detail.

[0030] 1. Before the medium temperature annealing of the superconducting cavity, in order to remove the defects (potholes, bumps, pollution) on the surface (mainly the inner surface) of the superconducting cavity, the inner and outer surfaces must be pre-treated. The general process is as follows:

[0031] 1. Perform visual inspection. The inner and outer surfaces of the superconducting cavity must be smooth, flat and clean. Optically inspect the area near the weld on the inner surface to ensure that there are no obvious defects.

[0032] 2. After ...

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Abstract

The invention discloses a medium-temperature annealing method for a superconducting cavity. The method comprises the following steps: 1) carrying out electrochemical polishing and cleaning on the inner surface of the superconducting cavity; 2) if the superconducting cavity is a dehydrogenated superconducting cavity, carrying out the step 3); otherwise, carrying out high-temperature annealing on the superconducting cavity, and then carrying out the step 3); and 3) placing the superconducting cavity in a vacuum furnace, vacuumizing, heating to a medium-temperature area, and carrying out medium-temperature annealing after maintaining the temperature for a period of time. Compared with the traditional superconducting cavity treatment process, the surface resistance of the superconducting cavity can be further reduced, so that the power consumption of the superconducting cavity is reduced, and the process flow can be simplified.

Description

technical field [0001] The invention relates to a medium-temperature annealing method for a superconducting cavity, which belongs to the technical fields of particle accelerators, radio frequency superconductivity and low temperature. Background technique [0002] A superconducting cavity is a microwave resonant cavity used to accelerate charged particles in an accelerator, providing energy for charged particles, and its role in a superconducting accelerator is similar to that of a car's engine. At present, the conventional superconducting cavity is made of pure metal niobium, which has obvious advantages compared with the normal temperature cavity (high acceleration gradient, small cavity wall loss, large beam aperture, etc.). Therefore, a considerable proportion of the large-scale accelerator devices built and under construction in the world in recent years use superconducting cavities to accelerate various charged particles (electrons, protons, heavy ions...), such as the...

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Application Information

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IPC IPC(8): H05H7/18
CPCH05H7/18
Inventor 贺斐思潘卫民沙鹏米正辉刘佰奇靳松翟纪元戴旭文葛锐李中泉刘振超戴劲董超杜磊赵建兵张占军孙良瑞
Owner INST OF HIGH ENERGY PHYSICS CHINESE ACADEMY OF SCI
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