High-gain harmonic generation free-electron laser at saturation

T. Shaftan, M. Babzien, I. Ben-Zvi, S. G. Biedron, L. F. DiMauro, A. Doyuran, William Graves, J. Jagger, E. Johnson, S. Krinsky, R. Malone, I. Pogorelsky, V. Sajaev, B. Sheehy, J. Skaritka, L. Solomon, G. Rakowsky, I. Vasserman, J. H. Wu, X. J. WangM. Woodle, V. Yakimenko, L. H. Yu

Research output: Chapter in Book/Report/Conference proceedingConference contribution


We report on observations of the output of a high-gain harmonic-generation (HGHG) free-electron laser (FEL) at saturation. A seed CO2 laser at a wavelength of 10.6 μm was used to generate amplified FEL output at 5.3 μm. Measurement of the frequency spectrum, pulse duration and correlation length of the 5.3-μm output verified the longitudinal coherence of the light. At the exit of the device, measurements of the energy distribution of the electron beam indicated that the HGHG process had reached saturation. By comparing the intensities of the higher harmonics (2.65 μm and 1.77 μm) relative to the 5.3-μm fundamental, additional evidence confirming saturated operation was obtained. These results agree with theoretical predictions at saturation. We also briefly describe the status of a new HGHG experiment at the Source Development Laboratory (BNL), aimed at achieving generation of 100-nm radiation.

Original languageEnglish (US)
Title of host publicationProceedings of the IEEE Particle Accelerator Conference
EditorsP Lucas, S Webber
Number of pages3
StatePublished - 2001
Externally publishedYes
Event2001 Particle Accelerator Conference - Chicago, IL, United States
Duration: Jun 18 2001Jun 22 2001


Other2001 Particle Accelerator Conference
Country/TerritoryUnited States
CityChicago, IL

ASJC Scopus subject areas

  • General Engineering


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