The currents induced by arbitrarily strong dc electric fields in plasma and the evolution of electron distributions have been studied by Fokker-Planck simulations. We find that the electron distributions evolve distinctly under different fields; especially, the electron distribution is well represented by the sum of a stationary and drifting Maxwellian at the moderate field. A set of hydrodynamiclike equations, similar to Spitzer’s but without the weak-field limit, is given for calculating the current. It is more suitable for application in hybrid particle-in-cell simulations and may extend plasma transport theory in models that do not employ a kinetic description of the electrons.
- plasma currents
- plasma physics
- electron distribution
Weng, S. M., Sheng, Z-M., He, M. Q., Zhang, J., Norreys, P. A., Sherlock, M., & Robinson, A. P. L. (2008). Plasma currents and electron distribution functions under a dc electric field of arbitrary strength. Physical Review Letters, 100(18), . https://doi.org/10.1103/PhysRevLett.100.185001