Nuclear Science and Techniques

《核技术》(英文版) ISSN 1001-8042 CN 31-1559/TL     2019 Impact factor 1.556

Nuclear Science and Techniques ›› 2018, Vol. 29 ›› Issue (12): 175 doi: 10.1007/s41365-018-0512-z


Nonlinear energy chirp compensation with corrugated structures

Zhen Wang, Chao Feng, Da-Zhang Huang, Qiang Gu, Meng Zhang   

  1. Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
  • Contact: Meng Zhang
  • Supported by:

    This work was supported by the National Natural Science Foundation of China (Nos. 11675248 and 11775294) and the Youth Innovation Promotion Association CAS (No. 2018300).

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Zhen Wang, Chao Feng, Da-Zhang Huang, Qiang Gu, Meng Zhang. Nonlinear energy chirp compensation with corrugated structures.Nuclear Science and Techniques, 2018, 29(12): 175     doi: 10.1007/s41365-018-0512-z

Abstract: Herein, a feasible method is proposed to compensate the high-order effect during bunch length compression, thereby enhancing the peak current of a highrepetition- rate X-ray free-electron laser source. In the proposed method, the corrugated structure is inserted downstream of the high-order harmonic cavities to function as a passive linearizer and enhance the longitudinal profile of the electron beam. Three-dimensional simulations are performed to analyze the evolution of the longitudinal phase space, and the results demonstrate that the profile of the electron beam is improved and the peak current can be easily optimized to over 2 kA with a bunch charge of 100 pC.

Key words: Corrugated structure, Nonlinear energy chirp, High-repetition-rate FEL