S. Yi et al., PLASMA SHEATH EVOLUTION FROM PERTURBED ELECTRODES IN A NEGATIVE-ION PLASMA .2. EXPERIMENT AND PIC SIMULATION, Journal of Plasma Physics, 58, 1997, pp. 455-466
The two-dimensional spatial and temporal evolution of a plasma surroun
ding an electrode whose potential is suddenly decreased is experimenta
lly investigated, The electrode contains a localized convex or a local
ized concave perturbation. The quasineutral plasma consists of positiv
e ions and various proportions of negative ions and electrons. The res
ults are compared and contrasted with those that are obtained numerica
lly using a particle-in-cell (PIG) simulation and those that had previ
ously been obtained using a fluid-model code.