Abstract

The potential gain of luminosity by both focusing and colliding {ital e}{sup +}{ital e{minus}} beams in an underdense plasma is investigated. We first suggest the possibility of creating the plasms by the beam self-induced tunneling ionization'' of a gas. We then study the beam optics in the continuous focusing environment provided by the plasma, and the subsequent {ital e}{sup +}{ital e{minus}} beam-beam interaction in the same plasma. When applied to a range of beam parameters based upon the present Stanford Linear Collider conditions, we find that a gain by more than a factor of 10 in luminosity is possible. The sensitivity of various nonideal situations is discussed.

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