Influence of the auxiliary plasma on the deuterium optical spectrum emitted from the dielectric target being irradiated by the e-beam with energy up to 25 keV

Abstract

The dielectric or metal targets isolated from the ground and being irradiated by an electron beam accumulate the electric charge on their surfaces. The amount of a charge is determined not only by the parameters of an e-beam and material of the target and sort and pressure of the gas in which the target is placed but also by the existence or absence of plasma around the target. The paper presents the experimental results about influence of the barrier discharge (BD) plasma on a spectrum of the radiation arising at a surface of a quartz plate irradiated by an electron beam with energy up to 25 keV. The high-current e-beam was generated by the pulsed open discharge in strongly overvoltage regime. The BD-plasma did not influence a shape of the Dα line radiated from the near-surface area of a target that proves a weak impact of the BD plasma on the charge of a target and electric field around the target.