Electromagnetic design and analysis of pi-mode structure for CSNS

Qu Peihua; Liu Huachang; Peng Jun; Wang Yun; Fan Mengxu; Li Ahong

doi:10.11884/HPLPB201830.170384

Volume 30 Issue 5

May 2018

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Qu Peihua, Liu Huachang, Peng Jun, et al. Electromagnetic design and analysis of pi-mode structure for CSNS[J]. High Power Laser and Particle Beams, 2018, 30: 055101. doi: 10.11884/HPLPB201830.170384

Citation:

Qu Peihua, Liu Huachang, Peng Jun, et al. Electromagnetic design and analysis of pi-mode structure for CSNS[J]. High Power Laser and Particle Beams, 2018, 30: 055101. doi: 10.11884/HPLPB201830.170384

Qu Peihua, Liu Huachang, Peng Jun, et al. Electromagnetic design and analysis of pi-mode structure for CSNS[J]. High Power Laser and Particle Beams, 2018, 30: 055101. doi: 10.11884/HPLPB201830.170384

Citation:

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Electromagnetic design and analysis of pi-mode structure for CSNS

doi: 10.11884/HPLPB201830.170384

Qu Peihua^{1, 2
,},
Liu Huachang^{1, 2},
Peng Jun^{1, 2},
Wang Yun^{1, 2},
Fan Mengxu^{1, 2},
Li Ahong^{1, 2}

1.
Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
2.
Dongguan Neutron Science Center, Dongguan 523803, China

Funds:

National Natural Science Foundation of China 11105166

Youth Innovation Promotion Association of CAS 2015011

More Information

Author Bio:
Qu Peihua (1991—), female, master, engaged in research of radio frequency technology for accelerator; quph@ihep.ac.cn
Received Date: 2017-09-25
Rev Recd Date: 2017-11-15
Publish Date: 2018-05-15

Abstract

Abstract

The phase one project of the China Spallation Neutron Source (CSNS) is in the stage of beam commissioning. In the future, the pi-mode structure (PIMS) will be used to upgrade the energy of linac from 80 MeV to 300 MeV. Some preliminarily study was done. The dimension of the PIMS was designed with 2D code SUPERFISH, where the operating frequency was 324 MHz and the β value was 0.4. Coupling coefficient, number of coupling slots and the shape of them were optimized by 3D code CST Microwave studio. The coupling coefficient was chosen to be 6.53%. Field flatness was tuned to 2.18% with slug tuners, which meet the operational requirements.
- pi-mode structure,
- electromagnetic design,
- coupling coefficient optimization,
- field flatness tuning

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References(10)

References

[1]	Peng Jun. Physics design and study of the CSNS drift tube linac[D]. Beijing: Institute of High Energy Physics, Chinese Academy of Sciences. 2008.
[2]	Wegner R, Gerigk F. PIMS―A simple and robust accelerating structure for high intensity proton linacs[J]. Nuclear Instruments and Methods in Physics Research A, 2009, 606: 257-270. doi: 10.1016/j.nima.2009.04.043
[3]	Gerigk F, Wegner R. Design of the pi-mode structure (PIMS) for linac4[C]//Proceedings of PAC09. 2009.
[4]	Liu Huachang, Peng Jun, Ruan Yufang, et al. Thermal analysis for the high duty cycle PIMS accelerator[J]. Chinese Physics C, 2010, 34(7): 1005-1008. doi: 10.1088/1674-1137/34/7/014
[5]	Wang Shuhong. The principle of proton linear accelerator[M]. Beijing: Atomic Energy Press. 1986.
[6]	Bian Xiaohao, Chen Huabi, Zheng Shuxin. Calculation of coupling factor for double-period accelerating structure[J]. High Energy Physics and Nuclear Physics, 2005, 29(9): 900-902.
[7]	Zhang Jingru, Dai Jianping, Hou Mi, et al. Theoretical research on field distribution and coupling between cavities of RF deflector[J]. High Power Laser and Particle Beams, 2008, 20(10): 1671-1674. http://www.hplpb.com.cn/article/id/3731
[8]	Wilson I, Henke H. The LEP main-ring accelerating structure[R]. CERN, Geneva, 1989.
[9]	Gerigk F, Wegner R, Bourquin P, et al. The hot prototype of the pi-mode for linac4[C]//Proceedings of Linear Accelerator Conference LINAC2010. 2010.
[10]	Tirado P U, Gerigk F, Wegner R. Tuning procedure for the Linac4 Pi mode Structure (PIMS)//Proceedings of IPAC2012. 2012.