Phys. Rev. Lett. 95, 194801 (2005) [4 pages]High-Harmonic Inverse-Free-Electron-Laser Interaction at 800 nmReceived 4 March 2005; published 2 November 2005 We present the first direct observation of a higher-order inverse-free-electron-laser (IFEL) interaction. Interaction at the fourth, fifth, and sixth harmonics is observed from an IFEL operating at 800 nm. The harmonic spacing, relative harmonic strength, and transverse beam overlap of the interaction are all in good agreement with tracking simulations. © 2005 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.95.194801
DOI:
10.1103/PhysRevLett.95.194801
PACS:
41.75.Jv, 41.60.Cr
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