Observation of ion heating near cyclotron harmonics using a radio frequency modulated electron beam

Abstract

Ion heating near the ion cyclotron frequency and its harmonics has been observed using a modulated electron beam injected into the low-density afterglow of a beam-generated plasma. Ion energies of 200 eV for He, 500 eV for D, and 700 eV for H have been measured.

A Review of the Beam Plasma Discharge

“…Although ion heating was observed with density modulation at wj [29] it was reported that for n > 5 X 10 9 /c.c. the heating disappeared.…”

“…Low frequency beam modulation as a way of enhancing ion heating has been studied, using density modulation at noc [281, [29], and transverse modulation [30]. Although ion heating was observed with density modulation at wj [29] it was reported that for n > 5 X 10 9 /c.c.…”