Probe Diagnostics of a Rotating Plasma

Abstract

A technique for making probe measurements of the parameters of a plasma rotating in crossed radial electric and axial magnetic fields is described. Unlike the commonly used method, the processing of readings of the Langmuir triple probe was carried out using the results of measurements based on a Mach plasma probe. When using a magnetic field produced in a solenoid without end-to-end magnetic plugs, a positive potential with respect to the grounded anode and outer metal tube is observed in the plasma that arrives from the electric discharge source with the thermoemission cathode and the annular anode. It is shown that the speed of azimuthal electron drift in the crossed-fields system under investigation is much higher than the ion rotation speed.