We demonstrate an efficient mechanism for generating magnetic fields in turbulent, collisionless plasmas. By using fully kinetic, particle-in-cell simulations of an initially nonmagnetized plasma, we inspect the genesis of magnetization, in a nonlinear regime. The complex motion is initiated via a Taylor–Green vortex, and the plasma locally develops strong electron temperature anisotropy, due to the strain tensor of the turbulent flow. Subsequently, in a domino effect, the anisotropy triggers a Weibel instability, localized in space. In such active wave–particle interaction regions, the seed magnetic field grows exponentially and spreads to larger scales due to the interaction with the underlying stirring motion. Such a self-feeding process might explain magnetogenesis in a variety of astrophysical plasmas, wherever turbulence is present.
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The influence of liquid conductivity on electrical breakdown and hydrogen peroxide production in a nanosecond pulsed plasma discharge generated in a water-film plasma reactor
- Award ID(s):
- 1702166
- PAR ID:
- 10109653
- Date Published:
- Journal Name:
- Journal of Physics D: Applied Physics
- Volume:
- 52
- Issue:
- 7
- ISSN:
- 0022-3727
- Page Range / eLocation ID:
- 075201
- Format(s):
- Medium: X
- Sponsoring Org:
- National Science Foundation
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