Abstract

We have observed the inverse Smith-Purcell (ISP) effect for the first time by using a submillimeter wave laser as a driving source. The ISP effect is one of the candidates for laser-driven linacs with a metallic grating as an interaction circuit to produce acceleration gradient of a few GeV/m. In this paper, we describe our experimental apparatus including newly developed CO 2 laser and the first experimental evidence of this effect.

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