High-gain free-electron laser with orbital angular momentum seeded by an x-ray regenerative amplifier
Hao Sun,
Chao Feng,
Bo Liu
Abstract:High-gain high-mode generation (HGHMG) free-electron laser has been experimentally confirmed to produce vortex light from a relativistic electron beam and is proposed to generate fully-coherent, high-brightness hard x-ray carrying orbital angular momentum at modern free electron laser facilities. However, this requires a coherent x-ray seed laser with sufficient power to perform the helical modulation on the electron beam. In this contribution, we propose a promising scheme to generate a fully coherent x-ray s… Show more
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