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physics.plasm-ph2025
Universal fluctuation spectrum of Vlasov-Poisson turbulence
Michael L. Nastac, Robert J. Ewart, James Juno +2
The thermal fluctuation spectrum of the electric field arising due to particle noise in a quiescent Vlasov-Poisson plasma was derived in the 1960s. Here, we derive the universal fl…
physics.plasm-ph2024
Relaxation to universal non-Maxwellian equilibria in a collisionless plasma
Robert J. Ewart, Michael L. Nastac, Pablo J. Bilbao +3
Generic equilibria are derived for turbulent relaxing plasmas via an entropy-maximization procedure that accounts for the short-time conservation of certain collisionless invariant…
physics.plasm-ph2024
Phase-space entropy cascade and irreversibility of stochastic heating in nearly collisionless plasma turbulence
Michael L. Nastac, Robert J. Ewart, Wrick Sengupta +3
We consider a nearly collisionless plasma consisting of a species of `test particles' in 1D-1V, stirred by an externally imposed stochastic electric field. The mean effect on the p…