Improvement of reverse-taper enhanced echo-enabled harmonic lasing at SXFEL

Weijie Fan; Kaiqing Zhang; Chao Feng; Lingjun Tu; Minghua Zhao

doi:10.1117/12.2665920

9 June 2023 Improvement of reverse-taper enhanced echo-enabled harmonic lasing at SXFEL

Weijie Fan, Kaiqing Zhang, Chao Feng, Lingjun Tu, Minghua Zhao

Proceedings Volume 12581, X-Ray Free-Electron Lasers: Advances in Source Development and Instrumentation VI; 125810J (2023) https://doi.org/10.1117/12.2665920
Event: SPIE Optics + Optoelectronics, 2023, Prague, Czech Republic

Conference Poster

Abstract

The harmonic lasing technique was proposed to extend the harmonic up-conversion number, and a reverse taper undulator was then adopted to enhance the performance of the harmonic lasing process. But in a typical experiment, energy spread always plays an essential role in the exponential gain of a high-gain free electron laser. In this paper, phase shifters are employed at the Shanghai Soft X-ray Free Electron Laser Facility to reduce the damage effect of the energy spread and avoid the degradation of the final FEL performances. Three-dimensional simulations are conducted to verify the feasibility of the phase shifters’ ability to prevent high energy spread and obtain FEL with superior coherence.

Citation Download Citation

Weijie Fan, Kaiqing Zhang, Chao Feng, Lingjun Tu, and Minghua Zhao "Improvement of reverse-taper enhanced echo-enabled harmonic lasing at SXFEL", Proc. SPIE 12581, X-Ray Free-Electron Lasers: Advances in Source Development and Instrumentation VI, 125810J (9 June 2023); https://doi.org/10.1117/12.2665920

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