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Dry treatment method for superconductor cavity

A technology for dry processing and superconducting cavity, which is applied in the field of dry processing the surface of superconducting cavity, can solve the problems of complex device, high cost, increasing power and increasing acceleration field strength, etc., and achieves easy control and simple structure. , the effect of good processing effect

Inactive Publication Date: 2008-06-25
PEKING UNIV
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Problems solved by technology

However, the Q value (quality factor) of the superconducting cavity processed by electropolishing and chemical polishing is relatively low, and it is limited by the secondary electron multiplication discharge (MP, Multipacting), so it is impossible to increase the acceleration field strength by increasing the power
[0004] In addition, both BCP and EP have the problem of acid treatment, the device is relatively complicated, and the cost is very high

Method used

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  • Dry treatment method for superconductor cavity
  • Dry treatment method for superconductor cavity

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Embodiment Construction

[0024] Such as figure 2 Shown is a schematic structural diagram of an implementation device of a preferred embodiment of the present invention. In one embodiment of the present invention, the substrate 2 uses a titanium rod as the anode and is grounded; the superconducting cavity 1 is used as the cathode and is connected to negative high voltage. Wherein, the superconducting cavity 1 selects the DC-SC photocathode injector designed and developed by the radio frequency superconducting laboratory of Peking University, and its main body is a 1+1 / 2 pure niobium superconducting cavity (Hao Jiankui et al.: for high average power FEL DC-SC Photocathode Injector. Intense Lasers and Particle Beams, Volume 14, Issue 3, May 2002), prior to sputter polishing, pure niobium superconducting cavities were subjected to conventional surface treatments, including: mechanical Polishing (rolling), high pressure water washing, chemical polishing, electropolishing and high temperature treatment at...

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Abstract

The invention offers superconducting cavity dry type processing method. Its features are that the superconducting cavity is used as cathode; substrate is used as anode; inert gases is ionized in vacuum; the surface of the superconducting cavity is processed sputtering by plasma; the substrate is metal or alloy with the function of adsorbing gas. Compared with chemical polishing and electro-polishing, it has the advantages of clean, no acid harm, no pollution, simple structure, and easy control. In addition it offers MP practice for superconducting cavity at room temperature to limit cavity MP.

Description

technical field [0001] The invention relates to the field of electronic laser equipment processing technology, in particular to a method for dry-processing the surface of a superconducting cavity. Background technique [0002] The superconducting cavity is the most important part of the DC-SC photocathode injector, which directly affects the performance of the injector. The RF superconducting resonator can operate in the continuous wave mode, which is an advantage that the room temperature accelerating cavity cannot do. The acceleration gradient Eacc and the quality factor Q of the superconducting cavity are the two most important performance parameters. To improve the surface performance of the superconducting cavity, the most important thing is to improve the surface condition of the superconducting cavity. The surface condition of the superconducting cavity directly affects the low temperature performance of the superconducting cavity. The commonly used surface treatme...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23F4/04
Inventor 郝建奎赵夔黄森林焦飞
Owner PEKING UNIV
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