Bulletin of the American Physical Society
63rd Annual Meeting of the APS Division of Plasma Physics
Volume 66, Number 13
Monday–Friday, November 8–12, 2021; Pittsburgh, PA
Session BO06: Astrophysical Turbulence and Dynamos
9:30 AM–12:30 PM,
Monday, November 8, 2021
Room: Rooms 310-311
Chair: Archie Bott, Princeton University
Abstract: BO06.00003 : Large Scale Magnetic Field Growth and Stability in Hall-MHD Simulations of Quasi-Keplerian Flows*
9:54 AM–10:06 AM
Presenter:
Matthew C Pharr
(Columbia University)
Authors:
Matthew C Pharr
(Columbia University)
Fatima Ebrahimi
(Princeton Plasma Physics Laboratory)
Eric Blackman
(University of Rochester)
We employ the NIMROD code to conduct nonlinear numerical simulations of the plasmas at different ion inertial lengths, di, to examine the dominance of the principal modes in the magnetic behavior of the plasma. We follow this with our investigation of the Hall and MHD dynamo terms in the induction equation and the WKB derivation of a dispersion relation for perturbations of the system. We find that in the Hall regime a large-scale vertical magnetic field is generated with larger ion inertial lengths. We also provide analytic evidence for the alteration of the MRI stability condition in the Hall regime, suggesting that the Hall effect may cause laminar behavior. This work is relevant to weakly ionized accretion disks.
*This work was made possible by funding from the Department of Energy for the Summer Undergraduate Laboratory Internship (SULI) program. This work is supported by the US DOE Contract No. DE-AC02-09CH11466.
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