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Two-fluid low-collisionality equilibrium model and application to spherical torus plasmas
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10.1063/1.3526600
/content/aip/journal/pop/17/12/10.1063/1.3526600
http://aip.metastore.ingenta.com/content/aip/journal/pop/17/12/10.1063/1.3526600

Figures

Image of FIG. 1.
FIG. 1.

Computational domain and boundary.

Image of FIG. 2.
FIG. 2.

Reconstructed 2D spherical torus equilibrium (see Table I for the input parameters) The contours of the magnetic flux function (separatrix), 0.05, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9 are shown, where is the value of at the magnetic axis. at the outer boundary.

Image of FIG. 3.
FIG. 3.

Safety factor for the equilibrium shown in Fig. 2.

Image of FIG. 4.
FIG. 4.

Profiles at the symmetry-plane for the equilibrium shown in Fig. 2: ion temperature (), electron temperature (), density [n, Eq. (B7a)], [Eq. (B7b)], and 0.2 times electrostatic potential (). See Appendix B for normalization of the physical quantities.

Image of FIG. 5.
FIG. 5.

Profiles at the symmetry plane for the equilibrium shown in Fig. 2: ion toroidal flow velocity (), electron toroidal flow velocity (), ion axial flow velocity (), and electron axial flow velocity ().

Image of FIG. 6.
FIG. 6.

Comparison of profiles of the reconstructed equilibrium shown in Fig. 2 with NSTX shot 113460 (see Fig. 2 of Ref. 5): (a) reconstructed ion (pink solid line) and electron (cyan solid line) temperatures; (b) reconstructed density (pink solid line) and (green dotted thin line); (c) reconstructed ion toroidal flow velocity (pink solid line).

Image of FIG. 7.
FIG. 7.

Ratio of the ion axial to toroidal flow velocities.

Image of FIG. 8.
FIG. 8.

Toroidal current density profiles at the symmetry plane for the equilibrium shown in Fig. 2: ion toroidal current density (), electron toroidal current density (), and toroidal current density ().

Image of FIG. 9.
FIG. 9.

Ion fluid force balance for the equilibrium shown in Fig. 2: pressure gradient force [], Lorentz force [], electric force (), and centrifugal force (centrifugal).

Image of FIG. 10.
FIG. 10.

Electron fluid force balance for the equilibrium shown in Fig. 2: pressure gradient force [], Lorentz force [], and electric force ().

Image of FIG. 11.
FIG. 11.

Ratio of the ion inertial length to the local scale length of ion pressure gradient, and ratio of the ion gyroradius .

Image of FIG. 12.
FIG. 12.

Flow velocities perpendicular to the magnetic field for ions () and electrons (), compared to the drift velocity () for the equilibrium shown in Fig. 2.

Image of FIG. 13.
FIG. 13.

Maxwellian ion distribution on the outboard midplane shifted by in the cocurrent direction.

Tables

Generic image for table
Table I.

Input parameters and coefficients.

Generic image for table
Table II.

Various values of the reconstructed equilibrium.

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/content/aip/journal/pop/17/12/10.1063/1.3526600
2010-12-28
2014-04-17
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Two-fluid low-collisionality equilibrium model and application to spherical torus plasmas
http://aip.metastore.ingenta.com/content/aip/journal/pop/17/12/10.1063/1.3526600
10.1063/1.3526600
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