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

ZHOU Kui; YANG Liu; SUN Guo-Ping; YAO Zhong-Yuan; QUAN Sheng-Wen; LUO Xing; LU Xiang-Yang

doi:10.1088/1674-1137/37/7/077002

Chinese Physics C> 2013, Vol. 37> Issue(7) : 077002 DOI: 10.1088/1674-1137/37/7/077002

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

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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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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

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Received: 2012-09-18
Revised: 1900-01-01

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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

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

Corresponding author: LU Xiang-Yang,

Received Date: 2012-09-18

Accepted Date: 1900-01-01

Available Online: 2013-07-05

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.

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

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通讯作者: 陈斌, bchen63@163.com

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

Corresponding author: LU Xiang-Yang,

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