Investigation of the Expansion Rate Scaling of Plasmas in the Electron Diffusion Gauge Experiment

摘要

The expansion of the Electron Diffusion Gauge (EDG) pure electron plasma due to collisions with background neutral gas atoms is characterized by the pressure and magnetic field scaling of the profile expansion rate (d/dt) . Data obtained at higher background gas pressures than previously studied is presented. The measured expansion rate in the higher pressure regime is found to be in good agreement with the classical estimate of the expansion rate.