An X-Ray Regenerative Amplifier Free-Electron Laser Using Diamond Pinhole Mirrors

H.P. Freund, P.J.M. van der Slot*, Yu Shvyd'ko

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

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X-ray free-electron lasers (FELs) rely on SASE due to the lack of seed lasers and the difficulty in obtaining mirrors. Progress in diamond crystal Bragg mirrors enables the design of x-ray FEL oscillators. Regenerative amplifiers (RAFELs) are high gain/low-Q oscillators that out-couple most of the optical power. An x-ray RAFEL based on the LCLS-II at SLAC using a six-mirror resonator out-coupling 90% or more through a pinhole in the first downstream mirror is analyzed using the MINERVA simulation in the undulator and OPC for the resonator. Results show substantial powers at the fundamental (3.05 keV) and 3rd harmonic (9.15 keV).
Original languageEnglish
Article number093028
Number of pages10
JournalNew journal of physics
Publication statusPublished - 16 Sep 2019


  • Oscillator
  • Regenerative amplifier
  • X-ray
  • Free-electronlaser


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