Towards x-ray free-electron laser oscillators

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

Research output: Contribution to conferencePosterAcademic


Free-electron lasers generating x-ray wavelengths typically operate in the self-amplified spontaneous emission (SASE) regime. Self-seeding by filtering an SASE pulse and subsequently amplifying the filtered optical pulse can be used to improve the coherence properties of the light produced. To obtain fully coherent optical pulses would require an oscillator configuration. At these wavelengths, single-crystal diamond can be used as a highly reflecting Bragg reflector. Here we consider 6 Bragg reflectors and 2 compound refractive lenses to create a stable ring resonator. To avoid excessive heating of the mirrors, we consider a so-called RAFEL configuration where a large fraction of the light is extracted from the resonator. Wavelength tuning is obtained by rotating the mirrors to change the Bragg condition. Assuming LCLS-II like parameters, we show lasing at 3.05 keV photon energy with substantial output power and high degree of coherence.
Original languageEnglish
Publication statusPublished - 8 Oct 2019
Event43rd Annual Meeting NNV AMO 2019 - Conference Center "De Werelt", Lunteren, Netherlands
Duration: 8 Oct 20199 Oct 2019
Conference number: 43


Conference43rd Annual Meeting NNV AMO 2019
Abbreviated titleNNV AMO 2019
Internet address


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