The Inverse Smith-Purcell Effect in the Submillimeter Wave Region –Theoretical Analyses–

Abstract

The inverse Smith-Purcell effect is theoretically investigated in the submillimeter wave region for planning experiments. The effect in which coherent light waves interact with charged particles resonantly through a diffraction grating is one of the candidates for laser-driven linacs. The optimum grating dimensions with a rectangular groove profile are designed by analyzing the fields just in front of the grating surface. The energy spreads of the electrons resulting from interactions with the laser field were evaluated by computer simulations. It can be seen from the simulations that a laser power of 1 W can produce ∼ 30 eV increase in the electron energy spectrum.