Chinese Physics C > 2015, Vol. 39 > Issue(11): 117002 DOI: 10.1088/1674-1137/39/11/117002

Multipacting analysis for half wave resonators in the China ADS

1.
Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China

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Abstract：
In the China ADS (CIADS) proton accelerator, multipacting is an issue of concern for the superconducting cavities. The parallel codes Omega3P and Track3P, developed at SLAC under the support of the DOE SciDAC program, have been used to calculate the electromagnetic field distribution and to analyze the multipacting barriers of such cavities. In this paper, two types of 162.5 MHz half wave resonator cavities, HWR-010 (cylinder type with βof 0.10) and HWR-015 (taper type with βof 0.15) have been analyzed, and the results of the multipacting analyses show that the resonant electrons occur at different regions with different accelerating gradients. The two-point 1 ^storder multipacting on the short plate has also been researched and discussed.
- China ADS,
- superconducting,
- HWR,
- multipacting

References

[1]	YUE W M, HE Y, ZHANG S H et al. Proceedings of Linac 2012, Tel-Aviv, Israel, TUPB055, 2012, 600-602
[2]	YUE W M, HE Y, ZHANG S H et al. Proceedings of SRF 2013. Paris, France, THP016, 2013, 917-919
[3]	Padamsee H, Knobloch J, Hays T. RF superconductivity for Accelerators. John Wiely and Sons, Inc. 2008, 179-197
[4]	https://confluence.Slac.Stanford.edu/display/AdvComp/Materials+for+cw11
[5]	https://www.nersc.gov/
[6]	CHANG W, HE Y, WEN L H et al. Chinese Physics C, 2014, 38(5): 057001
[7]	ZHENG Z, Facco A, LIU Z, Popielarski J, Saito K, WEI J, ZHANG Y. Nuclear Instruments and Methods in Physics Research A, 2014, 735: 596-601
[8]	Park G T. Proceedings of SRF 2013. Paris, France, THP027, 2013, 955-958

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ZHANG Cong, ZHANG Sheng-Hu, HE Yuan, YUE Wei-Ming and CHANG Wei. Multipacting analysis for half wave resonators in the China ADS[J]. Chinese Physics C, 2015, 39(11): 117002. doi: 10.1088/1674-1137/39/11/117002

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Received: 2014-08-13

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Supported by National Natural Science Foundation (11221064, 91026001)

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1.
沈阳化工大学材料科学与工程学院沈阳 110142

Multipacting analysis for half wave resonators in the China ADS

Corresponding author:ZHANG Cong,

1. Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China

Received Date:2014-08-13
Available Online:2015-11-20

Fund Project:Supported by National Natural Science Foundation (11221064, 91026001)

Abstract:In the China ADS (CIADS) proton accelerator, multipacting is an issue of concern for the superconducting cavities. The parallel codes Omega3P and Track3P, developed at SLAC under the support of the DOE SciDAC program, have been used to calculate the electromagnetic field distribution and to analyze the multipacting barriers of such cavities. In this paper, two types of 162.5 MHz half wave resonator cavities, HWR-010 (cylinder type withβof 0.10) and HWR-015 (taper type withβof 0.15) have been analyzed, and the results of the multipacting analyses show that the resonant electrons occur at different regions with different accelerating gradients. The two-point 1^storder multipacting on the short plate has also been researched and discussed.