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M3D-C1 simulations with SPARC equilibrium

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Wenhao Wang

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The linear growth rate converges to ideal MHD limit when resistivity approaches zero.

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By increasing the Te_offset, the linear growth rate approaches ideal MHD case

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Case

resistivity

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Te_offset (eV)

0201

0.0

4.54E-02

7.8

0000

Spitzer

8.75E-02

7.8

0700

Spitzer

5.92E-02

0

0701

Spitzer

5.25E-02

-7.8

0702

Spitzer

4.62E-02

-78

0703

Spitzer

4.55E-02

-780

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Spitzer resistivity is mostly changed near the edge when changing Te_offset

  • Radial cut of the resistivity at z=0

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Te_offset=7.8 eV

Te_offset=0.0 eV

Te_offset=-78 eV

Te_offset=-780 eV

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  • Mode structure at R=1.3 always exists with different Te_offset’s
  • Radial cut of the “jy_plasma” at z=0

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Original case (Te_offset = 7.8 eV)

Te_offset = -780 eV

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  • The mode profile of two harmonics are not clearly separated in the radial direction, and seems to grow at the same linear growth rates

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  • A Sharp peak appeared near R=2.44 (close to the wall location) in the ideal MHD case and the constant resistivity cases

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ideal case (etar = 0.0)

etar = 1.0e-5

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Supplementary slides

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Spitzer resistivity

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Constant resistivity scan, Bateman = 0.8

  • Growth rate is comparable to 1.00E-05 case

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Case

etar_norm

gam_norm

model

Bateman

ntor

0000

spitzer

8.75E-02

numvar=3

0.8

1

0103

0.00E+00

4.54E-02

numvar=3

0.8

1

0102

1.00E-08

4.55E-02

numvar=3

0.8

1

0101

1.00E-07

4.67E-02

numvar=3

0.8

1

0100

1.00E-06

5.61E-02

numvar=3

0.8

1

0104

1.00E-05

9.98E-02

numvar=3

0.8

1