Enhanced Self-Seeding with Ultrashort Electron Beams

Erik Hemsing, Aliaksei Halavanau, and Zhen Zhang
Phys. Rev. Lett. 125, 044801 – Published 22 July 2020
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Abstract

We describe a new method to produce intensity stable, highly coherent, narrow-band x-ray pulses in self-seeded free electron (FEL) lasers. The approach uses an ultrashort electron beam to generate a single spike FEL pulse with a wide coherent bandwidth. The self-seeding monochromator then notches out a narrow spectral region of this pulse to be amplified by a long portion of electron beam to full saturation. In contrast to typical self-seeding where monochromatization of noisy self-amplified spontaneous emission pulses leads to either large intensity fluctuations or multiple frequencies, we show that this method produces a stable, coherent FEL output pulse with statistical properties similar to a fully coherent optical laser.

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  • Received 7 February 2020
  • Revised 15 June 2020
  • Accepted 1 July 2020

DOI:https://doi.org/10.1103/PhysRevLett.125.044801

© 2020 American Physical Society

Physics Subject Headings (PhySH)

Accelerators & BeamsStatistical Physics & ThermodynamicsAtomic, Molecular & Optical

Authors & Affiliations

Erik Hemsing*, Aliaksei Halavanau, and Zhen Zhang

  • SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA

  • *ehemsing@slac.stanford.edu
  • aliaksei@slac.stanford.edu
  • zzhang@slac.stanford.edu

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Issue

Vol. 125, Iss. 4 — 24 July 2020

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