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Simulation of spheromak evolution and energy confinementa)
a)Paper PI1B 3, Bull Am. Phys. Soc. 49, 286 (2004).
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10.1063/1.1869501
/content/aip/journal/pop/12/5/10.1063/1.1869501
http://aip.metastore.ingenta.com/content/aip/journal/pop/12/5/10.1063/1.1869501
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

(a) Vacuum magnetic fields and spheromak configuration. (b) Injector current time history in simulation lam07.

Image of FIG. 2.
FIG. 2.

Snapshots of the toroidally averaged poloidal magnetic flux showing spheromak formation and the magnetic energy as a function of time and toroidal Fourier mode number in NIMROD simulation lam06 with .

Image of FIG. 3.
FIG. 3.

Injector current, gun voltage, and poloidal magnetic field measured at the midplane of the flux conserver by an edge probe in NIMROD simulation lam07 and measurements from SSPX shot 12 705 during formation. Oscillations in the lam07 magnetic energy history correlate with oscillations in the voltage and .

Image of FIG. 4.
FIG. 4.

Toroidally averaged poloidal flux, magnetic field lines, and contours showing topology change in the magnetic field attributed to reconnection in simulation lam07. Reconnection is generated by current sheets with negative , which are strongest near the point of the mean-field spheromak.

Image of FIG. 5.
FIG. 5.

Time histories of the edge poloidal magnetic field at the midplane of the flux conserver, the injector current, and the peak in NIMROD simulation lam06 and SSPX shot 12 560.

Image of FIG. 6.
FIG. 6.

Time histories of the edge-probe poloidal magnetic field fluctuation data from SSPX discharge shot 12 560 and simulation lam06.

Image of FIG. 7.
FIG. 7.

Magnetic field–line puncture plot at a reference toroidal angle and the corresponding contours from simulation lam06, and the spatial profile of from SSPX shot 12 560.

Image of FIG. 8.
FIG. 8.

Safety factor and at five times as functions of the poloidal flux in NIMROD simulation lam06.

Image of FIG. 9.
FIG. 9.

(a) Time history data from SSPX shot 10 233 and (b) time histories of the edge poloidal magnetic field near the flux-conserver midplane and the peak in the NIMROD two-pulse simulation sphp09np.

Image of FIG. 10.
FIG. 10.

Magnetic energy time history decomposed by toroidal Fourier mode, and at : contours, contours, and magnetic field–line puncture plot at a reference toroidal angle from the NIMROD two-pulse simulation sphp09np.

Image of FIG. 11.
FIG. 11.

Edge poloidal magnetic field time history near the midplane of the flux conserver in sphp09p; temperature time histories in NIMROD double-pulse simulations sphp09np and sphp09o , and single-pulse simulation sphp09p ; contours and magnetic field–line puncture plot at in the single-pulse simulation sphp09p.

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2005-04-07
2014-04-18
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Simulation of spheromak evolution and energy confinementa)
http://aip.metastore.ingenta.com/content/aip/journal/pop/12/5/10.1063/1.1869501
10.1063/1.1869501
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