Full-wave simulations on helicon and parasitic excitation of slow waves near the edge plasma
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Helicon waves↗
Engineering topics
Poulos, Matthew
Publications and source records attributed to Poulos, Matthew.
Analysis of nonlinear features associated with radio-frequency sheaths
An analytic study is conducted of nonlinear features that arise when radio-frequency (RF) sheath boundary conditions are solved self-consistently with the electromagnetic fields in a magnetized plasma. An instability associated with RF sheath–plasma interactions is identified and shown to be closely linked with sheath–plasma resonance and the occurrence of multiple solutions. It is proposed that this instability serves as a physical mechanism that enables jumping from one solution branch to another, providing a physical basis for the prediction of an RF sheath hysteresis in the time domain. It is further shown that this instability can lead to non-intuitive features such as spontaneous symmetry breaking in an otherwise completely symmetric problem. In plane-stratified geometry, two analytically solvable examples are considered for the cases of an unbounded half-space and a bounded domain
70 PLASMA PHYSICS AND FUSION TECHNOLOGY↗