Simulation analysis and optimization design of RF grid-controlled electron gun

Wang Yujie; He Xiaozhong; Qin Zhen; Tang Ruo

doi:10.11884/HPLPB202537.250020

Article Contents

Article Navigation > High Power Laser and Particle Beams > 2025 > Accepted Manuscript

Wang Yujie, He Xiaozhong, Qin Zhen, et al. Simulation analysis and optimization design of RF grid-controlled electron gun[J]. High Power Laser and Particle Beams. doi: 10.11884/HPLPB202537.250020

Citation:

Wang Yujie, He Xiaozhong, Qin Zhen, et al. Simulation analysis and optimization design of RF grid-controlled electron gun[J]. High Power Laser and Particle Beams. doi: 10.11884/HPLPB202537.250020

Wang Yujie, He Xiaozhong, Qin Zhen, et al. Simulation analysis and optimization design of RF grid-controlled electron gun[J]. High Power Laser and Particle Beams. doi: 10.11884/HPLPB202537.250020

Citation:

Wang Yujie, He Xiaozhong, Qin Zhen, et al. Simulation analysis and optimization design of RF grid-controlled electron gun[J]. High Power Laser and Particle Beams. doi: 10.11884/HPLPB202537.250020

PDF( 1974 KB)

Simulation analysis and optimization design of RF grid-controlled electron gun

doi: 10.11884/HPLPB202537.250020

Institute of Fluid Physics, CAEP, Mianyang 621900, China

Received Date: 2025-01-15
Accepted Date: 2025-06-10
Rev Recd Date: 2025-06-08

Available Online: 2025-06-23

Abstract

Abstract

The beam quality of the accelerator directly affects its application performance, and the structure of the electron gun determines the initial beam state of the accelerator. Optimizing the RF grid-controlled electron gun suitable for rhodotron and reducing its emittance can obtain higher CT imaging resolution. The Particle Tracking solver based on CST is simulated and analyzed to obtain a beam with a normalized rms emittance of 0.4918 mm·mrad and a peak current of 35 mA. And discussed the influence of changes in electron gun structure on the emittance of and TWISS parameters.The results show that when the focus Angle changes, the normalized rms emittance is greatly affected. And in 67.5°, 60° and 45°, the minimum normalized rms emittance is 0.2617 mm·mrad when the focus Angle is 60°.
- rhodotron,
- electron gun,
- grid-controlled,
- emittance

FullText(HTML)

References(18)

References

[1]	范家晖. 高精确度栅控电子枪的仿真与设计[D]. 成都: 电子科技大学, 2021 Fan Jiahui. Simulation and design of high precision grid control electron gun[D]. Chengdu: University of Electronic Science and Technology of China, 2021
[2]	Zhang Liang, Adam G, Militsyn B, et al. Electron injector based on thermionic RF-modulated electron gun for particle accelerator applications[J]. IEEE Transactions on Electron Devices, 2020, 67(1): 347-353. doi: 10.1109/TED.2019.2954778
[3]	Sprangle P, Peñano J, Hafizi B, et al. High average current electron guns for high-power free electron lasers[J]. Physical Review Special Topics - Accelerators and Beams, 2011, 14: 020702. doi: 10.1103/PhysRevSTAB.14.020702
[4]	Huang Zhirong, Kim K J. Review of x-ray free-electron laser theory[J]. Physical Review Special Topics - Accelerators and Beams, 2007, 10: 034801. doi: 10.1103/PhysRevSTAB.10.034801
[5]	St Aubin J, Steciw S, Kirkby C, et al. An integrated 6 MV linear accelerator model from electron gun to dose in a water tank[J]. Medical Physics, 2010, 37(5): 2279-2288. doi: 10.1118/1.3397455
[6]	He Xiaozhong, Yang Liu, Liao Shuqing, et al. Rhodotron and rotating target: a solution towards micro-spot for high energy and high dose rate bremsstrahlung sources[J]. Applied Radiation and Isotopes, 2022, 189: 110446. doi: 10.1016/j.apradiso.2022.110446
[7]	廖树清, 何小中, 杨柳, 等. 大功率花瓣加速器X射线闪光放射治疗设备设计研究[J]. 中国医学装备, 2024, 21(1):21-23,28 Liao Shuqing, He Xiaozhong, Yang Liu, et al. Study on the design of X-ray flash-RT equipment with high power petal accelerator[J]. China Medical Equipment, 2024, 21(1): 21-23,28
[8]	Peng Xiaoyu, Hu Tongning, Peng Yufei, et al. Optimized design of a thermionic electron gun applied to a high-power FEL injector[C]//Proceedings of 2023 IEEE 4th China International Youth Conference On Electrical Engineering (CIYCEE). 2023: 1-6.
[9]	Bakker R J, van der Geer C A J, van der Meer A F G, et al. 1 GHz modulation of a high-current electron gun[J]. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 1991, 307(2/3): 543-552.
[10]	Gough C, Ivkovic S, Le Pimpec F, et al. High gradient electrodes for a diode-RF electron gun[C]//Proceedings of the 1st International Particle Accelerator Conference. 2010.
[11]	和天慧, 罗星, 劳成龙, 等. 基于IOT放大器的微波功率源在超导直线加速器上的应用[J]. 原子能科学技术, 2019, 53(9):1629-1633 He Tianhui, Luo Xing, Lao Chenglong, et al. Application of microwave power source based on IOT amplifier in superconducting linear accelerator[J]. Atomic Energy Science and Technology, 2019, 53(9): 1629-1633
[12]	Zong Yang, Cao Shuchun, Zhao Quantang, et al. Experimental proof test of CW mode RF modulated grid-controlled thermionic electron gun[J]. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2022, 1021: 165958. doi: 10.1016/j.nima.2021.165958
[13]	Kim K J. Rf and space-charge effects in laser-driven rf electron guns[J]. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 1989, 275(2): 201-218. doi: 10.1016/0168-9002(89)90688-8
[14]	谢应猛, 张善才, 汤振兴. 一种微波栅控直流电子枪初步物理设计[J]. 核技术, 2015, 38:060104 Xie Yingmeng, Zhang Shancai, Tang Zhengxing, et al. Preliminary physical design of a RF-gated gridded thermionic gun[J]. Nuclear Techniques, 2015, 38: 060104
[15]	刘波. BEPCⅡ电子枪系统的研究[D]. 北京: 中国科学院高能物理研究所, 2005: 12-17 Liu Bo. Study of BECPII electron gun system[D]. Beijing: The Institute of High Energy Physics of the Chinese Academy of Sciences, 2005: 12-17
[16]	承欢, 江剑平. 阴极电子学[M]. 西安: 西北电讯工程学院出版社, 1986: 20 Cheng Huan, Jiang Jianping. Cat hode elect ronics[M]. Xi'an: Xi'an Elect Riinformation Engineering Institute Press, 1986: 20
[17]	彭宇飞, 秦臻, 张篁, 等. 热阴极径向温度非均匀性对本征发射度的影响[J]. 强激光与粒子束, 2018, 30:035101 doi: 10.11884/HPLPB201830.170363 Peng Yufei, Qin Zhen, Zhang Huang, et al. Intrinsic emittance of thermal cathode with radial temperature variation[J]. High Power Laser and Particle Beams, 2018, 30: 035101 doi: 10.11884/HPLPB201830.170363
[18]	秦臻, 刘平, 李晨, 等. 用于花瓣形加速器的栅控电子枪研制[J]. 强激光与粒子束, 2025, 37:044005 doi: 10.11884/HPLPB202537.240286 Qin Zhen, Liu Pin, Li Chen, et al. Development of grid-controlled electron gun for rhodotron[J]. High Power Laser and Particle Beams, 2025, 37: 044005 doi: 10.11884/HPLPB202537.240286