Full fluid moment modeling of rotating spokes in Penning-type configuration

Mansour, A. R.; Hara, K.

doi:10.1088/1361-6595/ac6a73

Title: Full fluid moment modeling of rotating spokes in Penning-type configuration

Journal Article · 30 May 2022 · Plasma Sources Science and Technology

DOI: https://doi.org/10.1088/1361-6595/ac6a73 · OSTI ID:1979315

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Stanford University, CA (United States)

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. Furthermore, 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.

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Research Organization:: Stanford Univ., CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Fusion Energy Sciences (FES); US Air Force Office of Scientific Research (AFOSR)

Grant/Contract Number:: SC0020623; FA9550-18-1-0090

OSTI ID:: 1979315

Alternate ID(s):: OSTI ID: 2479072

Journal Information:: Plasma Sources Science and Technology, Vol. 31, Issue 5; ISSN 0963-0252

Publisher:: IOP PublishingCopyright Statement

Country of Publication:: United States

Language:: English

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