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 PO07: Fundamental Plasmas: Waves, Oscillations, Instabilities
2:00 PM–5:00 PM,
Wednesday, October 19, 2022
Room: 401 ABC
Chair: Stephen Vincena, UCLA
Abstract: PO07.00007 : Non-linear evolution of the current filamentation instability on ion time scales
3:12 PM–3:24 PM
Presenter:
Cinzia Chiappetta
(Physics Department, Lancaster University, Lancaster (UK))
Authors:
Cinzia Chiappetta
(Physics Department, Lancaster University, Lancaster (UK))
Maria Elena Innocenti
(Ruhr Universitaet Bochum)
Kevin M. Schoeffler
(Instituto Superior Técnico)
Nitin Shukla
(Instituto Superior Tecnico)
Elisabetta Boella
(Lancaster University)
In this work, we investigate the onset and long-term development of the CFI in counterstreaming electron-ion flows. In order to explore the plasma dynamics on large spatial and long temporal scales, we take full advantage of the semi-implicit algorithm implemented in the energy-conserving Particle-In-Cell code ECsim (1). Our numerical results indicate that the magnetic field driven by the instability survives for hundreds of ion plasma periods. The instability produces magnetic field filaments which evolve from sub-electron scales to beyond the ion inertial length at a rate t (0.6-1), depending on the flow velocity and the plasma anisotropy. The ion anisotropy, which remains substantial during the whole duration of our simulations, sustains the coalescence process of magnetic filaments.
(1) G. Lapenta et al., J. Plasma Phys. 83, 705830205 (2017).
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