Phys. Rev. Lett. 102, 014801 (2009) [4 pages]Observation of Synchrotron Sidebands in a Storage-Ring-Based Seeded Free-Electron LaserReceived 28 July 2008; published 8 January 2009 Seeded free-electron lasers (FELs) are among the future fourth-generation light sources in the vacuum ultraviolet and x-ray spectral regions. We analyze the seed temporal coherence preservation in the case of coherent harmonic generation FELs, including spectral narrowing and structure degradation. Indeed, the electron synchrotron motion driven by the seeding laser can cause sideband growth in the FEL spectrum. © 2009 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.102.014801
DOI:
10.1103/PhysRevLett.102.014801
PACS:
41.60.Cr, 42.25.Kb, 42.65.Ky
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