%0 Report
%4 sid.inpe.br/mtc-m19/2011/
%2 sid.inpe.br/mtc-m19/2011/
%@ INPE-16951-RPE/879
%A Ludwig, Gerson Otto,
%A Rodrigues, Paulo,
%A Bizarro, João Pedro Saraiva,
%@affiliation Instituto Nacional de Pesquisas Espaciais (INPE)
%@affiliation Centro de Fusão Nuclear, Portugal
%@affiliation Centro de Fusão Nuclear, Portugal
%@electronicmailaddress ludwig@plasma.inpe.br
%@electronicmailaddress par@cfn.ist.utl.pt
%@electronicmailaddress bizarro@cfn.ist.utl.pt
%T "Tokamak equilibria with strong toroidal current density reversal"
%D 2011
%I Instituto Nacional de Pesquisas Espaciais
%C São José dos Campos
%K Tokamak.
%X The equilibrium of large magnetic islands in the core of a tokamak in conditions of strong toroidal current density reversal is investigated by a new method. The method uses distinct spectral representations to describe each simply connected region as well as the containing shell that substitutes for the external plasma region. Equivalent surface current densities are dened on the boundaries of the islands and on the thin shell, giving a straightforward formulation to the interaction between regions. The equilibrium of the islands-shell system is determined by matching moments of the Dirichlet boundary conditions. The magnetohydrodynamic stability against a class of tilting displacements is examined by means of an energy principle. It is found out that the symmetric islands are stable but the nonsymmetric system presents a bifurcation in the equilibrium.
%P 177
%@language en
%9 RPQ
%3 publicacao.pdf