Development of S-band hybrid bunching-accelerating structure prototype

Gao Bin; Pei Shilun; Wang Hui; Zhao Shiqi; Chi Yunlong

doi:10.11884/HPLPB202133.200162

Volume 33 Issue 2

Jan. 2021

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Article Navigation > High Power Laser and Particle Beams > 2021 > 33(2): 024002

Gao Bin, Pei Shilun, Wang Hui, et al. Development of S-band hybrid bunching-accelerating structure prototype[J]. High Power Laser and Particle Beams, 2021, 33: 024002. doi: 10.11884/HPLPB202133.200162

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Gao Bin, Pei Shilun, Wang Hui, et al. Development of S-band hybrid bunching-accelerating structure prototype[J]. High Power Laser and Particle Beams, 2021, 33: 024002. doi: 10.11884/HPLPB202133.200162

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Development of S-band hybrid bunching-accelerating structure prototype

doi: 10.11884/HPLPB202133.200162

1.
Department of Engineering Physics, Tsinghua University, Beijing 100084, China
2.
Research and Design Center for Cyclotron, China Institute of Atomic Energy, Beijing 102413, China
3.
Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China

Received Date: 2020-06-12
Rev Recd Date: 2020-10-19
Publish Date: 2021-01-07

Abstract

Abstract

Hybrid bunching-accelerating structure (HBaS) is a novel RF structure integrating a standing-wave(SW) pre-buncher (PB), a traveling-wave (TW) buncher (B) and a standard accelerating structure together. This paper presents the design results, including beam dynamic optimization, microwave design and the cold test of the S-band HBaS prototype, and explicates the reason of transverse emittance increasement caused by the hybrid structure. The low RF power results are in good agreement with the RF design. The measured S₁₁ at operation frequency is less than −45 dB, the phase shift deviation is less than ±2° and the bandwidth is more than 5 MHz (VSWR≤1.2). The axis field distribution fully meets the dynamic requirements.
- bunching system,
- hybrid bunching-accelerating structure,
- non-resonant perturbation measurement,
- SLAC method,
- low power test

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References

[1]	Ren W, Liu Y, Wu W, et al. The BEPC R&D Report, Part I: Injector[R]. Beijing: Institute of High Energy Physics, Chinese Academy of Sciences 1989.
[2]	Pisen A, Rinolfi L. A new bunching system for the LEP injector linac[R]. CERN PS90-58 (LP), 1990.
[3]	Zhao Minhua, Lin Guoqiang, Zhong S P, et al. Preliminary design report of SSRF linac[R]. Shanghai: Shanghai Institute of Applied Physics, Chinese Academy of Sciences, 2004.
[4]	Kulkarni N S, Dhingra R, Kumar V. Physics design of a 10 MeV, 6 kW travelling wave electron linac for industrial applications[J]. Pramana J Phys, 2016, 87: 74. doi: 10.1007/s12043-016-1279-6
[5]	Spataro B, Valloni A, Alesini D, et al. RF properties of a X-band hybrid photoinjector[J]. Nuclear Instruments Methods in Physics Research Section A, 2011, 657: 99-106. doi: 10.1016/j.nima.2011.04.057
[6]	Rosenzweig J B, Valloni A, Alesini D, et al. Design and application of an X-band hybrid photo injector[J]. Nuclear Instruments Methods in Physics Research Section A, 2011, 657: 107-113. doi: 10.1016/j.nima.2011.05.046
[7]	Fukasawa, Badakov H, O’Shea B D, et al. Beam dynamics and RF cavity design of a standing/traveling-wave hybrid photoinjector for high brightness beam generation[C]// Proc of PAC. 2009: 4434-4436.
[8]	Rosenzweig J B, Alesini D, Boni A, et al. Beam dynamics in a hybrid standing wave[J]. AIP Conference Proceedings, 2006, 877: 635. doi: 10.1063/1.2409195
[9]	Hüning M, Schmitz M, Libig C. An electron linac injector with a hybrid buncher structure[C]//Proceedings of LINAC. 2010.
[10]	Nie Y C, Liebig C, Hüning M, et al. Tuning of 2.998 GHz S-band hybrid buncher for injector upgrade of LINAC II at DESY[J]. Nuclear Instruments Methods in Physics Research Section A, 2014, 761: 69-78. doi: 10.1016/j.nima.2014.05.043
[11]	Pei Shilun, Xiao Ouzheng. Studies on an S-band bunching system with hybrid buncher[C]//Proc of IPAC. 2013: 1121-1122.
[12]	Pei Shilun, Gao Bin. Studies on the S-band bunching system with the hybrid bunching-accelerating structure[J]. Nuclear Instruments Methods in Physics Research Section A, 2018, 888: 64-69. doi: 10.1016/j.nima.2018.01.011
[13]	Chi Yunlong, Pei Shilun, Pei Guoxi, et al. Progress on the construction of the 100 MeV/100 kW electron linac for the NSCKIPT neutron source[J]. Chinese Physics C, 2014, 38: 047005. doi: 10.1088/1674-1137/38/4/047005
[14]	Pei Shilun, Chi Yunlong, Wang Shuhong, et al. Beam dynamics studies on the 100 MeV/100 kW electron linear accelerator for NSCKIPT neutron source[J]. Chinese Physics C, 2012, 36: 653-660. doi: 10.1088/1674-1137/36/7/015
[15]	Billen J B, Young L M. Poisson SUPERFISH[M]. LA-UR-96-1834, 2006.
[16]	Gao Bin, Pei Shilun, Chi Yunlong. Design studies on an S-band hybrid accelerating structure[C]//13th Symposium on Accelerator Physics. 2017:92-95.
[17]	Zhao Shiqi, Pei Shilun, Gao Bin, et al. Field distribution measurement and tuning of the hybrid buncher[J]. High Power Laser and Particle Beams, 2017, 29: 065104.
[18]	Holtkamp N, Khabiboulline T, Dohlus M. Tuning of a 50-cell constant gradient S-band traveling wave accelerating structure by using a nonresonant perturbation method[R]. DESY Report M-95-02, 1995.