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RIS citation export for MOP085: The Destructive Effects to the RF Coupler by the Plasma Discharge

AU  - Wu, A.D.
AU  - Chu, Q.W.
AU  - Guo, H.
AU  - He, Y.
AU  - Huang, S.C.
AU  - Jiang, T.C.
AU  - Li, C.L.
AU  - Lin, Z.Q.
AU  - Pan, F.
AU  - Song, Y.K.
AU  - Tan, T.
AU  - Yue, W.M.
AU  - Zhang, S.H.
AU  - Zhao, H.W.
ED  - Michel, Peter
ED  - Arnold, André
ED  - Schaa, Volker RW
TI  - The Destructive Effects to the RF Coupler by the Plasma Discharge
J2  - Proc. of SRF2019, Dresden, Germany, 30 June-05 July 2019
CY  - Dresden, Germany
T2  - International Conference on RF Superconductivity
T3  - 19
LA  - english
AB  - The low temperature RF plasma was proved an effec-tive method to clean the niobium surface and relieve the field emission effect for the SRF cavities. In the case of half-wave resonators, these cavities were usually powered via the fundamental coupler with the electric coupling. Thus, coupler antennas were fixed in the intense electric field region, and this region was where the plasma rou-tinely ignited. Therefore, the ceramic window of coupler taken the risk of breakdown under the sputtering of ions and heating loads that may be caused by the plasma drift and diffusion from the electric field region. In this paper, the plasma ignition for surface cleaning on the HWR cavity and its coupler was investigated, and the power transmission, temperature raising and vacuum degradation were tested to characterize the adverse impacts on the ceramic window. Finally, the solution was proposed to figure these issues.
PB  - JACoW Publishing
CP  - Geneva, Switzerland
SP  - 285
EP  - 287
KW  - plasma
KW  - cavity
KW  - experiment
KW  - vacuum
KW  - coupling
DA  - 2019/08
PY  - 2019
SN  - 978-3-95450-211-0
DO  - doi:10.18429/JACoW-SRF2019-MOP085
UR  - http://jacow.org/srf2019/papers/mop085.pdf
ER  -