Quasi-steady-state steep temperature steps have been experimentally observed in dense (> 1019m−3) linear magnetized helium plasma columns submerged in a high-density (> 100 mT) neutral-gas environment. The formation of such features is found to be favored by a high neutral gas density or a positive bias (≥ Vfl placed on the end plate. A rapid reduction in plasma density and electron temperature is observed to exist across the steps, as is a dramatic increase in neutral line radiation. Potential steps are inferred. Detailed Langmuir probe measurements have revealed three-dimensional structures. Possible mechanisms of formation are discussed.
All Science Journal Classification (ASJC) codes
- Physics and Astronomy(all)