Physical Review Special Topics. Accelerators and Beams (May 2004)

Experimental study of a high-gain harmonic-generation free-electron laser in the ultraviolet

  • Adnan Doyuran,
  • Louis DiMauro,
  • William Graves,
  • Richard Heese,
  • Erik D. Johnson,
  • Sam Krinsky,
  • Henrik Loos,
  • James B. Murphy,
  • George Rakowsky,
  • James Rose,
  • Timur Shaftan,
  • Brian Sheehy,
  • Yuzhen Shen,
  • John Skaritka,
  • Xijie Wang,
  • Zilu Wu,
  • Li Hua Yu

DOI
https://doi.org/10.1103/PhysRevSTAB.7.050701
Journal volume & issue
Vol. 7, no. 5
p. 050701

Abstract

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Saturation of a high-gain harmonic-generation free-electron laser (HGHG-FEL) at 266 nm has been accomplished at the Brookhaven National Laboratory/Deep Ultra Violet Free Electron Laser Facility (BNL/DUV-FEL) by seeding with an 800 nm Ti:sapphire laser. We describe the diagnostics used to characterize the electron beam and the FEL output. Analytic and simulation calculations of the HGHG output are presented and compared with the experimental data. We also discuss the chirped pulse amplification of a frequency chirped seed by an energy chirped electron beam. The third harmonic at 88 nm accompanying the 266 nm fundamental has been used in an ion pair imaging experiment in chemistry, the first application of the BNL/DUV-FEL.