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Parallel transport of long mean-free-path plasma along open magnetic field lines: Parallel heat flux
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View: Figures


Image of FIG. 1.
FIG. 1.

Simulation setup: A symmetric flux expander is generated by current wires with The simulation domain has in the horizontal direction and in the vertical direction. The plasma is uniform in the z direction (out of plane) and symmetric about x = 0.

Image of FIG. 2.
FIG. 2.

The effective potential due to both mirror force and ambipolar electric field.

Image of FIG. 3.
FIG. 3.

The electron and ion distribution [] contour from the VPIC kinetic simulation. The left panel is at , and the right panel is at .

Image of FIG. 4.
FIG. 4.

Top: The ion temperature profile from simulation and analytical result; Bottom: the ion parallel heat flux from the simulation and analytical result.

Image of FIG. 5.
FIG. 5.

Top: The ion density from analytical and simulation results agree, and the passing electron density is much smaller; Bottom: the ion (electron) parallel flow speed (normalized to ) increases towards the wall. Here, the sound speed is defined as .

Image of FIG. 6.
FIG. 6.

The electron integration boundaries.

Image of FIG. 7.
FIG. 7.

Top: The electron temperature (solid line) from simulation, and the passing electron temperature (dashed line with □) from analytical result; Bottom: the electron parallel heat flux from kinetic simulation (solid line) and analytical (dashed line with □) result, and the passing electron parallel heat flux (dashed line with ×) from analytical result.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Parallel transport of long mean-free-path plasma along open magnetic field lines: Parallel heat flux