High-Power Femtosecond Soft X Rays from Fresh-Slice Multistage Free-Electron Lasers
Abstract
We demonstrate a novel multistage amplification scheme for self-amplified spontaneous-emission free electron lasers for the production of few femtosecond pulses with very high power in the soft x-ray regime. The scheme uses the fresh-slice technique to produce an x-ray pulse on the bunch tail, subsequently amplified in downstream undulator sections by fresh electrons. With three-stages amplification, x-ray pulses with an energy of hundreds of microjoules are produced in few femtoseconds. For single-spike spectra x-ray pulses the pulse power is increased more than an order of magnitude compared to other techniques in the same wavelength range.
- Publication:
-
Physical Review Letters
- Pub Date:
- June 2018
- DOI:
- 10.1103/PhysRevLett.120.264801
- Bibcode:
- 2018PhRvL.120z4801L