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 UP11: Poster Session VIII: In-Person, Hall A (2:00-3:30pm) and Virtual Poster Presentations (3:45-5:00pm)
MFE: Whole Device Modeling, High Field Tokamaks, Tokamak Physics, DIII-D
FUND:Reconnection, Turbulence
2:00 PM - 5:00 PM
Thursday, October 20, 2022
Room: Exhibit Hall A and Online
Abstract: UP11.00129 : Role of 3D plasmoid dynamics on the transition from collisional to kinetic reconnection*
Presenter:
Adam J Stanier
(Los Alamos Natl Lab)
Authors:
Adam J Stanier
(Los Alamos Natl Lab)
William S Daughton
(Los Alamos Natl Lab)
Ari Le
(Los Alamos National Laboratory)
Hantao Ji
(Princeton University)
Jonathan M Jara-Almonte
(Princeton Plasma Physics Laboratory)
The current layer forms in a collisional regime and rapid Joule heating causes: 1) The current-layer thickness (set by the Sweet-Parker scaling) to rapidly decrease. 2) Strong temperature gradients on the sheet edge that can stabilize the onset of the oblique plasmoid instability at larger angles. The plasmoid instability gives rise to strong super-Dreicer electric fields that cause the current sheet to rapidly thin down to electron scales.
[1] Stanier, A., et al., (2019). Phys. Plasmas, 26(7), 072121.
[2] Ji, H., et al. (2022). Nat. Rev. Phys., 1-20.
*Work supported by the DOE Frontier Plasma Science Program
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