Parameter Optimization of PAL-XFEL Injector

A photoinjector is used as the electron source to generate a high peak current and low emittance beam for an X-ray free electron laser (FEL). The beam emittance is one of the critical parameters to determine the FEL performance together with the slice energy spread and the peak current. The Pohang A...

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Bibliographic Details
Published in:Journal of the Korean Physical Society 2018, 72(10), , pp.1158-1165
Main Authors: Lee, Jaehyun, Ko, In Soo, Han, Jang-Hui, Hong, Juho, Yang, Haeryong, Min, Chang Ki, Kang, Heung-Sik
Format: Article
Language:English
Subjects:
Electrons
Emittance
Injectors
Laser beams
Mathematical and Computational Physics
Parameters
Particle and Nuclear Physics
Physics
Physics and Astronomy
Theoretical
물리학
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Summary:A photoinjector is used as the electron source to generate a high peak current and low emittance beam for an X-ray free electron laser (FEL). The beam emittance is one of the critical parameters to determine the FEL performance together with the slice energy spread and the peak current. The Pohang Accelerator Laboratory X-ray Free Electron Laser (PAL-XFEL) was constructed in 2015, and the beam commissioning was carried out in spring 2016. The injector is running routinely for PAL-XFEL user operation. The operational parameters of the injector have been optimized experimentally, and these are somewhat different from the originally designed ones. Therefore, we study numerically the injector parameters based on the empirically optimized parameters and review the present operating condition.
ISSN:0374-4884
1976-8524
DOI:10.3938/jkps.72.1158