Demonstration of Ion Acceleration by Slow Wave Driven by Beat Laser

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Excitation of plasma slow wave driven by counter irradiation of double様ine BEAT lase is examined to accelerate ions by plasma wave. When the laser was focused into the gas jet, scattered photon spectrum indicated a resonant excitation of plasma wave at the resonant density defined from the laser spectrum beating. If we assume a slow wave excitation, the wave amplitude is 0.22 kV/オm and acceleration gain is 2 keV. This is a promising result to demonstrate acceleration of ions by plasma wave.