ECCD control of dynamics of asymmetric magnetic islands in a sheared flow

Sheared viscous flow deforms magnetic island and the formulation of the problem of control of neoclassical tearing modes by localized, phased electron cyclotron current drive (ECCD) may be altered. We address some aspects of this question by providing a new version of the Rutherford evolution model applicable to asymmetric neoclassical islands and concentrate on the estimate of the consequences of island deformation on the ECCD stabilization term.