A linac is proposed in which a laser first excites plasmons along the inner surface of a metallic acceleration tube. The potential of the plasmon oscillation then accelerates electron beams. This technique features a beam size in the nm range and good conversion efficiency from laser intensity to acceleration gradient; a MW laser will attain a gradient exceeding the GeV/m level, although the current is very small. Acceleration of ions is also discussed.
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Saito et al. (2003) studied this question.
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