Experimental results from an injector for an IR FEL

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An electron injector capable of delivering the high brightness electron beam necessary for an infrared free-electron laster (FEL) is described. The injector is composed of a high-DC-voltage GaAs photocathode gun coupled with a normal-conducting rf buncher and two superconducting rf cavities operating at 1.497 GHz. The gun pulse structure is mode locked to the fortieth subharmonic of the rf fundamental using a Nd:YLF drive laser. The gun provides 50 picosecond FWHM bunches at 60 pC per bunch with a normalized RMS transverse emittance less than 6 mmmrad at 9.5 MeV/c and an average current of 1.1 mA. Experimental measurements of ... continued below

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137 Kilobytes pages

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Piot, P.; Biallas, G. & Bohn, C.L. June 1, 1998.

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Description

An electron injector capable of delivering the high brightness electron beam necessary for an infrared free-electron laster (FEL) is described. The injector is composed of a high-DC-voltage GaAs photocathode gun coupled with a normal-conducting rf buncher and two superconducting rf cavities operating at 1.497 GHz. The gun pulse structure is mode locked to the fortieth subharmonic of the rf fundamental using a Nd:YLF drive laser. The gun provides 50 picosecond FWHM bunches at 60 pC per bunch with a normalized RMS transverse emittance less than 6 mmmrad at 9.5 MeV/c and an average current of 1.1 mA. Experimental measurements of the transverse and longitudinal beam properties of the injector are described. The results are compared with PARMELA. Operational issues for the injector are also presented.

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137 Kilobytes pages

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  • EPAC '98, Stockholm (SE), 06/22/1998--06/28/1998

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  • Report No.: DOE/ER/40150-1352
  • Report No.: JLAB-ACC-98-06
  • Grant Number: AC05-84ER40150
  • Office of Scientific & Technical Information Report Number: 754298
  • Archival Resource Key: ark:/67531/metadc703918

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  • June 1, 1998

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  • Sept. 12, 2015, 6:31 a.m.

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  • Feb. 5, 2016, 9:32 p.m.

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Piot, P.; Biallas, G. & Bohn, C.L. Experimental results from an injector for an IR FEL, article, June 1, 1998; Newport News, Virginia. (digital.library.unt.edu/ark:/67531/metadc703918/: accessed October 20, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.