ELECTRON-TRANSPORT PROPERTIES OF STATIONARY PLASMA CLOUDS GENERATED WITH HOLLOW-CATHODE DISCHARGES

The electron transport properties of plasma clouds generated by a holl ow cathode discharge are investigated, The voltage-current characteris tic curves indicate that the electron-emitted electron current depends on both bias voltage and discharge current. The spatial dependence of the electronic density, plasma potential, and electronic temperature is measured, The loss rate of a high-energy group of electrons with th e radial distance is also presented, These experimental results are co mpared with a nonisothermal transport model which reproduces the spati al dependence of plasma properties.