It is known that the laser system, including a drive laser and a seed laser plays an important role in the externally-seeded free electron laser. In this paper, the design and layout of the drive laser and seed laser system of Shanghai Soft X-ray Free Electron Laser Facility (SXFEL) will be detailed introduced. Both two lasers employ the commercial laser amplifiers and home-made third harmonic generation devices to generate the ultraviolet laser pulse. Also, the pulse stretcher and image transmitted module are used to control the temporal and spatial distributions.
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Feng et al. (2024) studied this question.
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