Phys. Rev. Lett. 80, 520–523 (1998)Effect of a Matched Electron Beam on High-Gain Free-Electron-Laser Amplifier PerformanceReceived 27 June 1997; revised 3 October 1997; published in the issue dated 19 January 1998 It is commonly assumed that a matched electron beam optimizes free-electron-laser performance; however, this assumption has not been proven for operation in the high-gain regime. We test this hypothesis for a self-amplified spontaneous emission configuration using a 3D multimode simulation. The gain length predicted for a matched beam is in good agreement with analytic theory. Further, the simulation indicates that while the gain length is optimized for a matched beam the saturated power is not necessarily optimized. © 1998 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.80.520
DOI:
10.1103/PhysRevLett.80.520
PACS:
41.60.Cr, 52.75.Ms
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