Geometry dependent multipacting of a superconducting quarter-wave resonator at PKU

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ZHOU Kui, YANG Liu, SUN Guo-Ping, YAO Zhong-Yuan, QUAN Sheng-Wen, LUO Xing and LU Xiang-Yang. Geometry dependent multipacting of a superconducting quarter-wave resonator at PKU[J]. Chinese Physics C, 2013, 37(7): 077002. doi: 10.1088/1674-1137/37/7/077002
ZHOU Kui, YANG Liu, SUN Guo-Ping, YAO Zhong-Yuan, QUAN Sheng-Wen, LUO Xing and LU Xiang-Yang. Geometry dependent multipacting of a superconducting quarter-wave resonator at PKU[J]. Chinese Physics C, 2013, 37(7): 077002.  doi: 10.1088/1674-1137/37/7/077002 shu
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Received: 2012-09-18
Revised: 1900-01-01
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Geometry dependent multipacting of a superconducting quarter-wave resonator at PKU

    Corresponding author: LU Xiang-Yang,

Abstract: A superconducting quarter-wave resonator (QWR) of frequency=162.5 MHz and β =0.085 (β=v/c) has been designed at Peking University. The multipacting (MP) simulation and analysis for the QWR with CST Particle Studio has been performed. The simulation results reveal that there is no sign of MP with its normal operating accelerating gradients in the range of 6-8 MV/m. The accelerating gradient range that may incur MP is from about 1.4 to 3.2 MV/m, and the places where MP may be encountered are mainly located at the top part of the QWR. So the effect of different top geometries on MP has also been studied in depth. Our results show that an inward convex round roof is better than other round roofs, and plane roofs have an advantage over round roofs on the suppression of MP in general. While considering the optimization of its electromagnetic (EM) design, our initial designed model is also acceptable.

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