Author: Hernandez-Garcia, C.
Paper Title Page
WG1000 ERL2011 Summaries of Working Group 1 10
 
  • B.M. Dunham
    CLASSE, Ithaca, New York, USA
  • A. Arnold
    HZDR, Dresden, Germany
  • S.A. Belomestnykh, T. Rao
    BNL, Upton, Long Island, New York, USA
  • S.V. Benson, C. Hernandez-Garcia, R. Suleiman
    JLAB, Newport News, Virginia, USA
  • D.C. Nguyen
    LANL, Los Alamos, New Mexico, USA
  • N. Nishimori
    JAEA, Ibaraki-ken, Japan
  • T. Quast
    HZB, Berlin, Germany
  • M. Yamamoto
    KEK, Ibaraki, Japan
  
slides icon Slides WG1000 [0.035 MB]  
 
WG1009
 Operation Experience with DC Photoemission Guns at Jefferson Lab  
 
  • C. Hernandez-Garcia, F.E. Hannon
    JLAB, Newport News, Virginia, USA
  
  Funding: Financial support provided by ONR, Army Night Vision Laboratory, AF Research Laboratory, Joint Technology Office, Commonwealth of Virginia, and U.S. DOE BES Contract No. DE-AC05-060R23177.
The Jefferson Lab IR/VUV FEL operates with a 325kV DC Photoemission electron gun based on GaAs photocathodes. Since 2008 the electron gun has delivered 325keV beam for FEL operations. More recently in February 2011, a copy of the FEL gun was tested in the Gun Test Stand with a bulk resistivity insulator from WESGO/Morgan. Despite being able to achieve 500kV for 8 hours under partial pressure of Krypton, the gun could not hold voltage under nominal vacuum conditions beyond 440kV, at which voltage the insulator suffered a massive puncture. Observations and results on field emission processing techniques using Krypton gas and insulator performance will be presented. 		 
slides icon Slides WG1009 [1.323 MB]