Bulletin of the American Physical Society
64th Annual Meeting of the APS Division of Plasma Physics
Volume 67, Number 15
Monday–Friday, October 17–21, 2022; Spokane, Washington
Session TO07: Fundamental Plasmas: Elementary Plasma Processes and Diagnostics
9:30 AM–12:30 PM,
Thursday, October 20, 2022
Room: 401 ABC
Chair: Earl Scime, WVU
Abstract: TO07.00010 : Neutrals and Electromagnetic drift-Rossby-Alfvén turbulence: Drag, Entrainment, and Ambipolar Diffusion*
11:18 AM–11:30 AM
Presenter:
Chang-Chun Chen
(University of California, San Diego)
Authors:
Chang-Chun Chen
(University of California, San Diego)
Patrick H Diamond
(University of California, San Diego)
Mikhail A Malkov
(University of California, San Diego)
Steven Tobias
(Univ of Leeds)
Zonal flows in DRAT are regulated by the competition between Reynolds and Maxwell stresses. In the simplest model, magnetic stress is in turn determined by the evolution of mean square magnetic potential. Magnetic dissipation is of paramount importance here, since it damps magnetic fields and thus Maxwell stresses, and so regulates zonal flows and drift wave turbulence. With neutrals, the process of ambipolar diffusion, leading to the balance which determines the existence of zonal flows and thus turbulence levels. These differ qualitatively and quantitatively from the previous findings. The implications for boundary turbulence and transport will be discussed.
*This work is supported by the U.S. Department of Energy under Award No. DE-FG02-04ER54738
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