The Slac Polarized Electron Source*

نویسندگان

  • H. TANG
  • R. ALLEY
  • J. CLENDENIN
  • J. FRISCH
  • G. MULHOLLAN
  • P. SAEZ
  • D. SCHULTZ
چکیده

The SLAC polarized electron source employs a photocathode DC high voltage gun with a loadlock and a YAG pumped Ti:sapphire laser system for colliding beam experiments or a flash lamp pumped Ti:sapphire laser for fixed target experiments. It uses a thin, strained GaAs(100) photocathode, and is capable of producing a pulsed beam with a polarization of ≥80% and a peak current exceeding 10 A. Its operating efficiency has reached 99%. The physics and technology of producing high polarization electron beams from a GaAs photocathode will be reviewed. The prospects of realizing a polarized electron source for future linear colliders will also be discussed. Invited talk presented at the International Workshop on Polarized Beams and Polarized Gas Targets Cologne, Germany, June 6–9, 1995 * Work supported by Departement of Energy contract DE-AC03-76SF00515.

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تاریخ انتشار 1997