A mean field Ohm`s law for collisionless plasmas

Technical Report · Tue Jun 01 04:00:00 EDT 1993

DOI:https://doi.org/10.2172/10171251· OSTI ID:10171251

Biglari, H ^[1]; Diamond, P H ^[2]

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1. Princeton Univ., NJ (United States). Plasma Physics Lab.
2. California Univ., San Diego, La Jolla, CA (United States). Dept. of Physics

A mean field Ohm`s law valid for collisionless plasmas is derived kinetically. It is shown that contrary to conventional thinking, the resulting hyper-resistivity is significantly smaller than its fluid counterpart due to the fact that the turbulent decorrelation rate is linked to the rapid electron ballistic motion rather than the slower nonlinear mixing time. Moreover, the off-diagonal contributions to the parallel electron momentum flux are shown to result in Ohm`s law renormalizations that dwarf the current diffusivity and break radial parity symmetry. Thus, the conventional wisdom of tearing and twisting parity solutions appears to be vitiated in the turbulent collisionless regime.

• Research Organization: Princeton Univ., NJ (United States). Plasma Physics Lab.; California Univ., San Diego, La Jolla, CA (United States). Dept. of Physics
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: AC02-76CH03073; FG03-88ER53275
• OSTI ID: 10171251
• Report Number(s): PPPL--2919; ON: DE93016719
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700330
COLLISIONLESS PLASMA
DISTRIBUTION FUNCTIONS
KINETIC EQUATIONS
NONLINEAR PROBLEMS
OHM LAW
PLASMA KINETICS, TRANSPORT, AND IMPURITIES
TURBULENCE