Free-electron laser design operating in the SASE mode using the PALADIN wiggler

Henry P. Freund; Patrick G. O'Shea; John M. J. Madey; Charles P. Neuman

doi:10.1117/12.279384

1 November 1997 Free-electron laser design operating in the SASE mode using the PALADIN wiggler

Henry P. Freund, Patrick G. O'Shea, John M. J. Madey, Charles P. Neuman

Proceedings Volume 3154, Coherent Electron-Beam X-Ray Sources: Techniques and Applications; (1997) https://doi.org/10.1117/12.279384
Event: Optical Science, Engineering and Instrumentation '97, 1997, San Diego, CA, United States

Abstract

It is commonly assumed that a matched electron beam optimizes free-electron laser (FEL) performance; however, this assumption has not been proven for FELs operating in the high gain regime. We test this hypothesis using a 3D multimode analysis which is capable of modeling matched and unmatched electron beams and for design parameters suitable for a SASE experiment at Duke University using the PALADIN wiggler. 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.

Citation Download Citation

Henry P. Freund, Patrick G. O'Shea, John M. J. Madey, and Charles P. Neuman "Free-electron laser design operating in the SASE mode using the PALADIN wiggler", Proc. SPIE 3154, Coherent Electron-Beam X-Ray Sources: Techniques and Applications, (1 November 1997); https://doi.org/10.1117/12.279384

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