EAST equilibrium current profile reconstruction using polarimeter-interferometer internal measurement constraints

J. P. Qian, L. L. Lao, H. Q. Liu, W. X. Ding, L. Zeng, Z. P. Luo, Q. L. Ren, Y. Huang, J. Huang, D. L. Brower, K. Hanada, D. L. Chen, Y. W. Sun, B. Shen, X. Z. Gong, B. J. Xiao, B. N. Wan

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    22 Citations (Scopus)

    Abstract

    The first equilibrium reconstruction of EAST current-density profile based on internal Faraday rotation measurements provided by the POlarimeter-INTerferometer (POINT) diagnostic is demonstrated using the EFIT equilibrium reconstruction code. EFIT incorporates 11 simultaneous line-integrated density and Faraday effect measurements from POINT to self-consistently reconstruct the equilibrium toroidal current density profile using a Faraday rotation reconstruction algorithm. It is shown that the POINT measurements can be applied to improve the accuracy of core plasma current density and q profile on EAST. Comparisons of magnetic surfaces and the q profile reconstructed using external magnetic data against those using magnetic and POINT data are presented. Equilibrium reconstructions using POINT data are found to be consistent with sawtooth phenomena. The sensitivity of equilibrium reconstruction to POINT measurements indicates Faraday rotation provides important constraints for determining the current profile.

    Original languageEnglish
    Article number036008
    JournalNuclear Fusion
    Volume57
    Issue number3
    DOIs
    Publication statusPublished - Mar 2017

    All Science Journal Classification (ASJC) codes

    • Nuclear and High Energy Physics
    • Condensed Matter Physics

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