Electron Acceleration in Plasma Wave Excited by Resonance Probe

概要

論文の詳細を見る
Another sort of peak, in the dc current component of the resonance probe, is observed when the plane probe is set across a plasma beam (neutraliged ion beam) produced by the back diffusion type mercury discharge. The dc peak is different from the ordinary sheath resonance and appears at a frequency higher than that frequency. A discharge tube for producing the plasma beam contains an electron injection region in the opposite boundary against the plane probe as shown in Fig. 1,(2). The dc peak depends on plasma beam density, applied rf signal voltage, length between the resonance probe and the opposite boundary, and pressure. It is remarkable that the dc peak frequency corresponds to a frequency where the rf current component shows a minimum, while the ordinary sheath resonance peak frequency also corresponds to a frequency where the rf current component shows a maximum. Therefore, the dc peak is considered to appear at the electron plasma frequency, and to result from the synchronous acceleration of electrons injected into the plasma wave excited one-dimensionally in the plasma beam by the resonance probe.
核融合科学研究所の論文