Equilibrium reconstruction for single helical axis reversed field pinch plasmas

E. Martines, R. Lorenzini, B. Momo, D. Terranova, P. Zanca, A. Alfier, F. Bonomo, A. Canton, A. Fassina, P. Franz, P. Innocente

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Abstract

Single helical axis configurations are emerging as the natural state for high-current reversed field pinch plasmas. These states feature the presence of transport barriers in the core plasma. Here we present a method for computing the equilibrium magnetic surfaces for these states in the force-free approximation, which has been implemented in the SHEq code. The method is based on the superposition of a zeroth-order axisymmetric equilibrium and of a first-order helical perturbation computed according to Newcomb's equation supplemented with edge magnetic field measurements. The mapping of the measured electron temperature profiles, soft x-ray emission and interferometric density measurements on the computed magnetic surfaces demonstrates the quality of the equilibrium reconstruction. The procedure for computing flux surface averages is illustrated, and applied to the evaluation of the thermal conductivity profile. The consistency of the evaluated equilibria with Ohm's law is also discussed. © 2011 IOP Publishing Ltd.
Original languageEnglish
Article number035015
Pages (from-to)-
JournalPlasma Physics and Controlled Fusion
Volume53
Issue number3
DOIs
Publication statusPublished - Mar 2011
Externally publishedYes

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All Science Journal Classification (ASJC) codes

  • Nuclear Energy and Engineering
  • Condensed Matter Physics

Cite this

Martines, E., Lorenzini, R., Momo, B., Terranova, D., Zanca, P., Alfier, A., ... Innocente, P. (2011). Equilibrium reconstruction for single helical axis reversed field pinch plasmas. Plasma Physics and Controlled Fusion, 53(3), -. [035015]. https://doi.org/10.1088/0741-3335/53/3/035015