Alternate Transport Techniques for Electron Induction Linacs

Abstract

Alternate focusing methods will have significant cost and design advantages if they are effective. In this paper the authors outline results and prospects for several of these techniques. The most obvious of the alternate techniques is to use gas cells between accelerating gaps. The pinch force acts to confine the beam. The use of gas cells has also been proposed to damp oscillations due to the beam breakup instability. Experimental results on a particular facet of this problem-extraction from a magnetic region into a gas cell -- are discussed. Results from the first experimental demonstration of the 'image' or 'foil' focusing technique are presented.