Second Harmonic FEL Oscillation

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We have produced and measured for the first time second harmonic oscillation in the infrared region by the high average power Jefferson Lab Infrared Free Electron Laser. Although such lasing is ideally forbidden, since gain is zero on axis for a perfect electron beam in an infinite wiggler, the finite geometry and beam emittance allows sufficient gain for lasing to occur. We were able to lase at pulse rates up to 74.85 MHz and could produce over 4.5 watts average and 40 kW peak of IR power in a 40 nm FWHM bandwidth at 2925 nm. In agreement with predictions, ... continued below

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386 KILOBYTES pages

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Neil, George R.; Benson, S.V.; Biallas, G.; Freund, H.P.; Gubeli, J.; Jordan, K. et al. September 1, 2001.

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We have produced and measured for the first time second harmonic oscillation in the infrared region by the high average power Jefferson Lab Infrared Free Electron Laser. Although such lasing is ideally forbidden, since gain is zero on axis for a perfect electron beam in an infinite wiggler, the finite geometry and beam emittance allows sufficient gain for lasing to occur. We were able to lase at pulse rates up to 74.85 MHz and could produce over 4.5 watts average and 40 kW peak of IR power in a 40 nm FWHM bandwidth at 2925 nm. In agreement with predictions, the source preferentially lased in a TEM01 mode. We present results of initial source performance measurements and comparisons of gain as calculated by different approaches.

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386 KILOBYTES pages

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  • FEL 2001, Darmstadt (DE), 08/20/2001--08/24/2001; Other Information: PBD in Nuclear Instruments and Methods in Physics Research A, Vol. 483 (1-2) (2002) pp. 119-124

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  • Report No.: JLAB-ACC-01-16
  • Report No.: DOE/ER/40150-1903
  • Grant Number: AC05-84ER40150
  • Office of Scientific & Technical Information Report Number: 786149
  • Archival Resource Key: ark:/67531/metadc718483

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • September 1, 2001

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  • Sept. 29, 2015, 5:31 a.m.

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  • Feb. 5, 2016, 9:44 p.m.

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Neil, George R.; Benson, S.V.; Biallas, G.; Freund, H.P.; Gubeli, J.; Jordan, K. et al. Second Harmonic FEL Oscillation, article, September 1, 2001; Newport News, Virginia. (digital.library.unt.edu/ark:/67531/metadc718483/: accessed December 16, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.