Laboratory-Relevant, Non-Linear, Two-Fluid Model of Stationary Inertial Alfven Waves for the Space-Plasma Physics Campaign at UCLA's BAPSF.

Details Laboratory-Relevant, Non-Linear, Two-Fluid Model of Stationary Inertial Alfven Waves for the Space-Plasma Physics Campaign at UCLA's BAPSF. Laboratory-Relevant, Non-Linear, Two-Fluid Model of Stationary Inertial Alfven Waves for the Space-Plasma Physics Campaign at UCLA's BAPSF.

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006agufmsm13a0332f&link_type=abstract

American Geophysical Union, Fall Meeting 2006, abstract #SM13A-0332

Physics

Plasma Physics

7831 Laboratory Studies And Experimental Techniques, 7867 Wave/Particle Interactions (2483, 6984)

Scientific paper

Knudsen (JGR, 1996) developed a non-linear, two-fluid model of uniform plasma convection across field- aligned current (FAC) sheets, describing stationary inertial Alfvén (SIA) waves. In the absence of collisions, SIA waves can accelerate electrons parallel to the background magnetic field and cause large, time- independent plasma-density variations having spatial periodicity in the direction of the convective flow over a broad range of spatial scales and energies. The fundamental properties of SIA waves suggest that they may play a role in auroral arc formation. Here, Knudsen's model has been generalized for warm, collisional plasma. For magnetic-field-aligned (parallel) electron drifts, it is shown that collisions are responsible for dissipative effects that significantly alter the perpendicular ac and dc structure of parallel electron drift velocity caused by SIA waves, without changing the conclusions of Knudsen's collisionless case. The case of anti-parallel- electron-drift (APED) shares many attributes of the parallel-electron-drift (PED) case, but, for non-zero collisionality, a range of initial parallel drift velocity is found in the APED case for which the perpendicular periodicities of the final parallel drift velocity vanish. Non-zero electron and ion temperatures are predicted to affect the perpendicular periodicity of the SIA wave structure and have minimal effect on the wave amplitude. Changes to the perpendicular structure of parallel electron drift velocity are less sensitive to these effects than to collisional effects. This generalized model of SIA waves will be used to make comparisons with experimental data obtained on the LArge-Plasma-Device (LAPD), as part of the Space-Plasma Physics Campaign (at UCLA's Basic Plasma Science Facility). This work supported by NSF.

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