Speaker
Description
The 80–300 MeV accelerating section of the CSNS-II linac is a superconducting accelerator, consisting of 10 double spoke modules and 8 elliptical cavity modules.For a user facility, the downtime associated with removing the module from the linac and returning it to the cleanroom for rinsing and reconditioning is unacceptable. Therefore, it is necessary to develop on-line performance recovery techniques for superconducting cavities to eliminate field emission and restore the operating gradient within a short time. On-line plasma cleaning has been proven to be a safe and effective technique for mitigating field emission in superconducting cavities. This report presents the development of plasma cleaning technology at CSNS-II, including the construction of the plasma cleaning platform, the implementation of plasma cleaning experiments, low-temperature CH₄ adsorption tests on a 2-cell elliptical cavity, and a comparison of vertical test results before and after plasma cleaning.
Funding Agency
The work is supported by the Guangdong Basic and Applied Basic Research Foundation (Grant No. 2022B1515120027)
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