Design of the photocathode drive laser system for high current electron beam operation of DC-SRF-II gun

Wu Tong; Xu Hang; Xu Jinqiang; Li Jingyi; Huang Senlin

doi:10.11884/HPLPB202234.220244

Volume 34 Issue 10

Aug. 2022

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Wu Tong, Xu Hang, Xu Jinqiang, et al. Design of the photocathode drive laser system for high current electron beam operation of DC-SRF-II gun[J]. High Power Laser and Particle Beams, 2022, 34: 104018. doi: 10.11884/HPLPB202234.220244

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Wu Tong, Xu Hang, Xu Jinqiang, et al. Design of the photocathode drive laser system for high current electron beam operation of DC-SRF-II gun[J]. High Power Laser and Particle Beams, 2022, 34: 104018. doi: 10.11884/HPLPB202234.220244

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Design of the photocathode drive laser system for high current electron beam operation of DC-SRF-II gun

doi: 10.11884/HPLPB202234.220244

Wu Tong^{1, 2
,},
Xu Hang^{3, 4
,
,},
Xu Jinqiang³,
Li Jingyi³,
Huang Senlin^{1, 2
,
,}

1.
State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China
2.
Institute of Heavy Ion Physics, School of Physics, Peking University, Beijing 100871, China
3.
Key Laboratory of Particle Acceleration Physics &Technology, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
4.
Spallation Neutron Source Science Center, Dongguan 523803, China

Received Date: 2022-08-09
Rev Recd Date: 2022-09-01

Available Online: 2022-09-02

Publish Date: 2022-08-22

Abstract

Abstract

We present the design of a 100 W high repetition rate photocathode drive laser system for realizing high average current operation of the superconducting accelerator at Peking University. To achieve good beam quality and reliability, we choose photonic crystal fiber (PCF) as the gain medium of the main amplification unit. In addition, we address several key issues for the drive laser system, including the evaluation of the output power of each amplification unit, the design of pulse stretcher and compressor, the optimization of free space coupling setups for pump pulse and seed pulse, etc. We also combine a high-speed semi-conductor optical amplifier (SOA) optical switch with a low-speed acousto-optic modulator (AOM) to achieve the necessary diagnostic mode for the intense electron beam accelerator. This unique design is of importance for the photocathode drive laser with the repetition rate around or above 100 MHz.
- intense electron beam accelerator,
- photocathode drive laser system,
- diagnostic mode,
- laser transmission

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References(18)

References

[1]	Galayda J N. The LCLS-II: a high power upgrade to the LCLS[C]//Proceedings of the 9th International Particle Accelerator Conference. Vancouver: JACoW Publishing, 2018.
[2]	Zhu Z Y, Zhao Z T, Wang D, et al. SCLF: an 8-GeV CW SCRF linac-based X-ray FEL facility in Shanghai[C]//Proceedings of the 38th International Free Electron Laser Conference. Santa Fe, NM, USA: JACoW Publishing, 2017: 20-25.
[3]	黄森林, 刘克新. 基于能量回收技术的光源—ERL光源[J]. 强激光与粒子束, 2022, 34:104011 doi: 10.11884/HPLPB202234.220076 Huang Senlin, Liu Kexin. Energy recovery linac light source[J]. High Power Laser and Particle Beams, 2022, 34: 104011 doi: 10.11884/HPLPB202234.220076
[4]	Stephan F, Krasilnikov M. High brightness photo injectors for brilliant light sources[M]//Jaeschke E J, Khan S, Schneider J R, et al. Synchrotron Light Sources and Free-Electron Lasers: Accelerator Physics, Instrumentation and Science Applications. Cham: Springer, 2020: 603-646
[5]	Nakamura N. Review of ERL projects at KEK and around the world[C]//International Particle Accelerator Conference 2012. 2012: 1040
[6]	Honda Y. Development of a photo-injector laser system for KEK ERL test accelerator[C]//International Particle Accelerator Conference 2012. 2012: 1530-1532.
[7]	Ouzounov D, Li Heng, Dunham B, et al. Fiber-based drive laser systems for the Cornell ERL electron photoinjector[C]//Proceedings of SPIE 7581, High Energy/Average Power Lasers and Intense Beam Applications IV. SPIE, 2010: 75810N
[8]	Zhao Zhi, Dunham B M, Bazarov I, et al. Generation of 110 W infrared and 65 W green power from a 1.3-GHz sub-picosecond fiber amplifier[J]. Optics Express, 2012, 20(5): 4850-4855. doi: 10.1364/OE.20.004850
[9]	Zhao Zhi, Dunham B M, Wise F W. Generation of 167 W infrared and 124 W green power from a 1.3-GHz, 1-ps rod fiber amplifier[J]. Optics Express, 2014, 22(21): 25065-25070. doi: 10.1364/OE.22.025065
[10]	许党朋, 林宏奂, 邓颖, 等. 高重复频率短脉冲全光纤激光系统[J]. 强激光与粒子束, 2014, 26:091002 doi: 10.11884/HPLPB201426.091002 Xu Dangpeng, Lin Honghuan, Deng Ying, et al. High repetition frequency all fiber short pulse laser system[J]. High Power Laser and Particle Beams, 2014, 26: 091002 doi: 10.11884/HPLPB201426.091002
[11]	李孝燊, 徐金强, 孙大睿. 高能所光阴极驱动激光系统研制[J]. 强激光与粒子束, 2018, 30:021001 doi: 10.11884/HPLPB201830.170344 Li Xiaoshen, Xu Jinqiang, Sun Darui. Drive laser system for a photocathode at IHEP[J]. High Power Laser and Particle Beams, 2018, 30: 021001 doi: 10.11884/HPLPB201830.170344
[12]	Xu Hang, Xu Jinqiang, Li Xiaoping, et al. High power drive laser system for photocathode at IHEP[J]. Optics Express, 2021, 29(18): 29550-29556. doi: 10.1364/OE.438199
[13]	Liu K, Chen J, Feng L, et al. Commissioning and operation of DC-SRF injector[C]//Proceedings of SRF2013. Paris, France, 2013.
[14]	Quan Shengwen, Hao Jiankui, Lin Lin, et al. Stable operation of the DC-SRF photoinjector[J]. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2015, 798: 117-120.
[15]	冯立文, 王天一, 贾豪彦, 等. 北京大学DC-SRF-II注入器光阴极驱动激光系统[J]. 强激光与粒子束, 2022, 34:104016 doi: 10.11884/HPLPB202234.210343 Feng Liwen, Wang Tianyi, Jia Haoyan, et al. Peking University’s DC-SRF-II photoinjector drive laser system[J]. High Power Laser and Particle Beams, 2022, 34: 104016 doi: 10.11884/HPLPB202234.210343
[16]	Haboucha A, Zhang W, Li T, et al. Optical-fiber pulse rate multiplier for ultralow phase-noise signal generation[J]. Optics Letters, 2011, 36(18): 3654-365. doi: 10.1364/OL.36.003654
[17]	Will I, Klemz G. Generation of flat-top picosecond pulses by coherent pulse stacking in a multicrystal birefringent filter[J]. Optics Express, 2008, 16(19): 14922-14937. doi: 10.1364/OE.16.014922
[18]	Liu Fangming, Huang Senlin, Si Shangyu, et al. Generation of picosecond pulses with variable temporal profiles and linear polarization by coherent pulse stacking in a birefringent crystal shaper[J]. Optics Express, 2019, 27(2): 1467-1478. doi: 10.1364/OE.27.001467