Magnetic Field Dependence of Transition to High Electron Density Phase in a Linear Plasma Device NUMBER

Abstract

High electron density discharge mode was observed in the downstream of a magnetic beach, so called test region in a linear plasma device with an electron cyclotron resonance source. A model for formation of the high density phase based on electron motion along the field line was proposed. The model reproduced the tendency that the duration of the high density phase was longer for the higher magnetic field in the test region in the experiment. Some discrepancies between the experiment and the model were newly found in the experiment with detailed scan in the magnetic field in the test region with the modified time evolution of the magnetic field.