[SLAC] [SLAC Pubs and Reports]

SLAC-PUB-7943
Polarized Electrons from High-Gradient Guns

Abstract

To take advantage of the lower emittance associated with extraction fields >>10 MV/m, a number of technological hurdles must be overcome before photocathodes appropriate for generating polarized electrons can be utilized in high-gradient guns. Both rf guns and very fast ultra-high gradient (= or >1 GV/m) diode guns are anticipated. The known problems-some of which may be more than just technical-are delineated, and the present status of relevant research is reviewed.

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