Error Field Correction in DIII-D Ohmic Plasmas With Either Handedness

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Error field correction results in DIII-D plasmas are presented in various configurations. In both left-handed and right-handed plasma configurations, where the intrinsic error fields become different due to the opposite helical twist (handedness) of the magnetic field, the optimal error correction currents and the toroidal phases of internal(I)-coils are empirically established. Applications of the Ideal Perturbed Equilibrium Code to these results demonstrate that the field component to be minimized is not the resonant component of the external field, but the total field including ideal plasma responses. Consistency between experiment and theory has been greatly improved along with the understanding of ... continued below

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Jong-Kyu Park, Michael J. Schaffer, Robert J. La Haye,Timothy J. Scoville and Jonathan E. Menard May 16, 2011.

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Error field correction results in DIII-D plasmas are presented in various configurations. In both left-handed and right-handed plasma configurations, where the intrinsic error fields become different due to the opposite helical twist (handedness) of the magnetic field, the optimal error correction currents and the toroidal phases of internal(I)-coils are empirically established. Applications of the Ideal Perturbed Equilibrium Code to these results demonstrate that the field component to be minimized is not the resonant component of the external field, but the total field including ideal plasma responses. Consistency between experiment and theory has been greatly improved along with the understanding of ideal plasma responses, but non-ideal plasma responses still need to be understood to achieve the reliable predictability in tokamak error field correction.

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  • Nuclear Fusion (September 2010)

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  • Report No.: PPPL-4623
  • Grant Number: DE-ACO2-09CH11466
  • Office of Scientific & Technical Information Report Number: 1014572
  • Archival Resource Key: ark:/67531/metadc831309

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • May 16, 2011

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  • May 19, 2016, 3:16 p.m.

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  • Aug. 3, 2016, 3:15 p.m.

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Jong-Kyu Park, Michael J. Schaffer, Robert J. La Haye,Timothy J. Scoville and Jonathan E. Menard. Error Field Correction in DIII-D Ohmic Plasmas With Either Handedness, report, May 16, 2011; Princeton, New Jersey. (digital.library.unt.edu/ark:/67531/metadc831309/: accessed January 17, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.