Self-organization during spherical torus formation by flux rope merging in the Mega Ampere Spherical Tokamak

P K Browning, A Stanier, G Ashworth, K G McClements, V S Lukin

    Research output: Contribution to journalArticlepeer-review

    Abstract

    Merging-compression start-up in the Mega Ampere Spherical Tokamak provides an opportunity to investigate the merging of flux ropes through magnetic reconnection, and the self-organization into a single flux rope, in a low-plasma-β, high-Lundquist-number plasma. We present an overview of simulations of this process using the compressible Hall-MHD equations in two dimensions. Preliminary results of an analytical model of the self-organization, assuming a helicity-conserving relaxation to a minimum energy state, are also presented. The relevance of these models to solar plasmas is discussed.
    Original languageEnglish
    JournalPlasma Physics and Controlled Fusion
    DOIs
    Publication statusPublished - 2014

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