Diagnostics of dust trap by the discharge glow in magnetic field

Abstract

Abstract In order to understand in detail the physical processes in the dusty plasma in the magnetic field in the stratified discharge, we carried out an experiment to observe the geometry of the glow of standing strata in the neon discharge. Stratified discharge was video recorded in longitudinal magnetic field inside magnetic coil at values of magnetic induction from 0 to 2700 G. As the magnetic field increased, both the configuration of the striation and the intensity of their glow changed. Video recording was carried out by a periscope video camera with the possibility of displaying an image on a computer. The results show a tendency to merge the strata; the head of the striation is lengthened. The suggested interpretation shows the decrease in the longitudinal gradient of the electron temperature, which leads to the decrease in the electron eddy current in the striation and the slight decrease in the rotational velocity of the dust structure.