Full fluid moment modeling of rotating spokes in Penning-type configuration
Abstract
Rotating spokes are observed in a partially magnetized plasma using a two-dimensional full fluid moment (FFM) model. In the present setup, where the radial electric field and plasma density gradient exist in opposite directions, it is observed that the spokes propagate in the direction of the diamagnetic drift and not the E × B drift. This is contrary to the modified Simon–Hoh instability, and the results suggest that the spokes can be driven by a strong diamagnetic drift. Different parameters, including magnetic field amplitude and physical domain size, influence the growth of the rotational instability as well as the dominant wave modes that arise. The propagation speed of the rotating spokes obtained from the FFM simulation are in good agreement with the observations in experimental and other computational work.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- May 01, 2022
- Source ID
- 10.1088/1361-6595/ac6a73
Entities
People
- A. R. Mansour
- Kentaro Hara
Organizations
- Air Force Office of Scientific Research
- Office of Fusion Energy Sciences