Phys. Rev. Lett. 100, 244802 (2008) [4 pages]A Proposal for an X-Ray Free-Electron Laser Oscillator with an Energy-Recovery LinacReceived 14 March 2008; published 17 June 2008 We show that a free-electron laser oscillator generating x rays with wavelengths of about 1 Å is feasible using ultralow emittance electron beams of a multi-GeV energy-recovery linac, combined with a low-loss crystal cavity. The device will produce x-ray pulses with 109 photons at a repetition rate of 1–100 MHz. The pulses are temporarily and transversely coherent, with a rms bandwidth of about 2 meV, and rms pulse length of about 1 ps. © 2008 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.100.244802
DOI:
10.1103/PhysRevLett.100.244802
PACS:
41.60.Cr, 41.50.+h, 42.55.Vc
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