期刊
PHYSICAL REVIEW ACCELERATORS AND BEAMS
卷 22, 期 5, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevAccelBeams.22.050701
关键词
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资金
- U.S. Department of Energy [DE-AC02-76SF00515]
- DOE-BES Accelerator and detector research program Field Work Proposal [100317]
- Department of Energy, Laboratory Directed Research and Development program at SLAC National Accelerator Laboratory [DE-AC02-76SF00515]
In this paper we propose a double chirp-taper method to produce two subfemtosecond x-ray free-electron lasers (XFELs) using electron beams with sinusoidal energy modulation. The taper of the undulator is optimized to control the power profile of each XFEL pulse to obtain a single-spike power shape. We present start-to-end numerical simulations of this method to demonstrate the generation of two XFEL pulses with similar to 0.4 fs full width at half maximum, with a time separation tunable from 0 to tens of fs and energy separation limited by the available undulator tuning range. The output of this method provides a powerful tool for XFEL pump-probe experiments at the attosecond timescale.
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