Propagation Of A Nonlinear Wave Packet Driven In A Relaxed Magnetohydrodynamic Plasma
Journal Of Plasma Physics
We report the observation of a nonlinear wave packet propagating through a relaxed Taylor state in the Swarthmore Spheromak eXperiment (SSX) device. The wave packet is launched by a fast, pulsed, high current (≈21 kA) single-turn theta-pinch coil mounted outside the plasma vessel. The theta-pinch coil is energized by discharging a 40 kV, 2 kJ capacitor circuit. The wave packet velocity is super-thermal and super-Alfvénic; its group velocity is more consistent with a whistler pulse than other characteristic velocities. We also observe a fast density pulse which indicates that it is not Alfvénic in nature.
M. Kaur and Michael R. Brown.
"Propagation Of A Nonlinear Wave Packet Driven In A Relaxed Magnetohydrodynamic Plasma".
Journal Of Plasma Physics.