An efficient technique for magnetic equilibrium reconstruction with q profile constraints and its application on the EAST tokamak

J. P. Qian, L. L. Lao, C. T. Holcomb, B. N. Wan, Y. W. Sun, D. Moreau, E. Li, L. Zeng, K. Hanada, A. M. Garofalo, X. Z. Gong, B. Shen, B. J. Xiao

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

An efficient technique for building plasma equilibria with preset or constrained q profiles by solving the nonlinear Grad-Shafranov equation iteratively is proposed. The technique uses a set of dynamic virtual poloidal field probes in the plasma core region. Numerical examples are shown for monotonic q profiles and negative central magnetic shear equilibria which are obtained with this technique. As a proof of principle, the technique is applied on the EAST tokamak, to constrain the plasma equilibrium reconstruction with the experimental q = 1 surface information from the ECE diagnostic in addition to the external magnetic measurements.

Original languageEnglish
Article number084001
JournalNuclear Fusion
Volume57
Issue number8
DOIs
Publication statusPublished - Jun 13 2017

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Condensed Matter Physics

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