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Gyrokinetic simulations of the tearing instability
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View: Figures


Image of FIG. 1.
FIG. 1.

(Color online) Growth rate and current sheet width versus the Lundquist number for . Red crosses, green squares, and blue circles show gyrokinetic results for (βe, σ) = (0.3, 0.01), (0.075, 0.0025), (0.01875, 0.000625), respectively. Red solid, green dashed, and blue dotted-dashed lines are the corresponding two-fluid scaling.14 The relevant scale lengths are identified on the right axis of the right panel.

Image of FIG. 2.
FIG. 2.

(Color online) Growth rate and current sheet width versus the Lundquist number for . Color and symbol schemes are the same as in Fig. 1. Lines are the two-fluid scalings obtained from Ref. 14. The scale lengths labelled on the right panel are fixed except ρe (the value of ρe shown corresponds to σ = 0.01). The points in the box are used to diagnose temperature fluctuations in Fig. 3.

Image of FIG. 3.
FIG. 3.

(Color online) Eigenfunctions for the βe  = 0.3 case, and the polytropic indices of ions and electrons in the perpendicular and the parallel directions. A spatially changing polytropic index means the equation of state is not polytropic.

Image of FIG. 4.
FIG. 4.

(Color online) Ion temperature dependence of the tearing growth rate and current layer width.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Gyrokinetic simulations of the tearing instability