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Gyrokinetic studies of the effect of β on drift-wave stability in the National Compact Stellarator Experiment
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10.1063/1.4771587
/content/aip/journal/pop/19/12/10.1063/1.4771587
http://aip.metastore.ingenta.com/content/aip/journal/pop/19/12/10.1063/1.4771587

Figures

Image of FIG. 1.
FIG. 1.

B vs. grid for NCSX QAS3, with s = 0.5, , and .

Image of FIG. 2.
FIG. 2.

Variation of the curvature drift term () (for n = 1) along for NCSX QAS3, with s = 0.5, , and .

Image of FIG. 3.
FIG. 3.

Variation of for NCSX QAS3, with s = 0.5, , and .

Image of FIG. 4.
FIG. 4.

Variation of and with for NCSX QAS3, comparing three codes.

Image of FIG. 5.
FIG. 5.

Comparison of vs. (with ) for GS2 (: blue line, : black line) and GKV-X (: green circles, : red crosses).

Image of FIG. 6.
FIG. 6.

NCSX beta flexibility studies comparing vs. for both and , at , and .

Image of FIG. 7.
FIG. 7.

NCSX beta flexibility studies comparing the curvature drift terms () along , for and 4%, at , and .

Image of FIG. 8.
FIG. 8.

NCSX beta flexibility studies comparing vs. for and 4%, at , and .

Image of FIG. 9.
FIG. 9.

ITG adiabatic electron growth rates vs. for NCSX , and .

Image of FIG. 10.
FIG. 10.

ITG adiabatic electron growth rates vs. temperature gradient for NCSX (blue circles) and 4% (red crosses), . Fits (dashed lines) obtained through piecewise linear interpolation on the lowest half of the growth rate curve.

Image of FIG. 11.
FIG. 11.

A representative electrostatic potential eigenfunction for these ITG modes. , and .

Image of FIG. 12.
FIG. 12.

Electrostatic ITG adiabatic electron growth rates (at of maximum ) vs. temperature gradient for NCSX for various density gradients: (blue circles), (green dashed line), and (red crosses).

Image of FIG. 13.
FIG. 13.

Electrostatic ITG adiabatic electron growth rates (at of maximum ) vs. temperature gradient for NCSX for various density gradients: (blue circles), (green dashed line), and (red crosses).

Image of FIG. 14.
FIG. 14.

Electrostatic ITG adiabatic electron growth rates (at of maximum ) vs. density gradient for NCSX for various temperature gradients: (blue circles), (green dashed line), (red crosses), and (black triangles).

Image of FIG. 15.
FIG. 15.

Electrostatic ITG adiabatic electron growth rates (at of maximum ) vs. density gradient for NCSX for various temperature gradients: (blue circles), (green dashed line), (red crosses), and (black triangles).

Image of FIG. 16.
FIG. 16.

Electrostatic ITG-TEM kinetic electron growth rates vs. for NCSX .

Image of FIG. 17.
FIG. 17.

Electrostatic ITG-TEM kinetic electron growth rates vs. for NCSX .

Image of FIG. 18.
FIG. 18.

Electrostatic ITG-TEM kinetic electron growth rates vs. temperature gradient for NCSX for various density gradients: (blue circles), (green dashed line), and (red crosses).

Image of FIG. 19.
FIG. 19.

Electrostatic ITG-TEM kinetic electron growth rates vs. temperature gradient for NCSX for various density gradients: (blue circles), (green dashed line), and (red crosses).

Image of FIG. 20.
FIG. 20.

Electrostatic ITG-TEM kinetic electron growth rates vs. density gradient for NCSX for various temperature gradients: (blue circles), (green dashed line), and (red crosses).

Image of FIG. 21.
FIG. 21.

Electrostatic ITG-TEM kinetic electron growth rates vs. density gradient for NCSX for various temperature gradients: (blue circles), (green dashed line), and (red crosses).

Image of FIG. 22.
FIG. 22.

Growth rates and real frequencies, in normalized units as a function of , for equilibrium (: red solid line, : blue dashed line) and (: blue circles, : green crosses). .

Image of FIG. 23.
FIG. 23.

for . Blue: and green: .

Image of FIG. 24.
FIG. 24.

for . Blue: and green: .

Image of FIG. 25.
FIG. 25.

for . Blue: and green: .

Image of FIG. 26.
FIG. 26.

NCSX : growth rates and frequencies () vs. for (: blue circles and : green crosses) and (: red solid line and : blue dashed line).

Image of FIG. 27.
FIG. 27.

NCSX : growth rates and frequencies () vs. for (: blue circles and : green crosses) and (: red solid line and : blue dashed line).

Tables

Generic image for table
Table I.

The set of local parameters used the microinstability simulation based on the NCSX QAS3 equilibrium.

Generic image for table
Table II.

Geometry values for the NCSX and 4% equilibria.

Generic image for table
Table III.

The base set of local parameters used in the NCSX studies.

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/content/aip/journal/pop/19/12/10.1063/1.4771587
2012-12-12
2014-04-19
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Gyrokinetic studies of the effect of β on drift-wave stability in the National Compact Stellarator Experiment
http://aip.metastore.ingenta.com/content/aip/journal/pop/19/12/10.1063/1.4771587
10.1063/1.4771587
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