The axisymmetric visco-resistive magnetohydrodynamic steady states allowing flows (i.e. non-vanishing velocity fields) are computed for a toroidal JET-like geometry. It is shown that spatially inhomogeneous heating of moderate magnitude leads to an increase typical speeds with respect the situation uniform temperature identical mean Hartmann numbers. A symmetry argument introduced capture break...

Abstract We present novel experimental evidence of parametric decay instability microwave beams in the plasma edge Wendelstein 7-X stellarator. propose that is sustained by trapping only one daughter wave non-monotonic density profile measured with high spatial resolution within a stationary magnetic island. The power levels and spectral shapes detected signal are reproduced numerical modelling...

We treat analytically a model that captures several features of the phenomenon of spatially inhomogeneous reversal of an order parameter. The model is a classical Ginzburg–Landau field theory restricted to a bounded one-dimensional spatial domain, perturbed by weak spatiotemporal noise having a flat power spectrum in time and space. Our analysis extends the Kramers theory of noise-induced trans...

In this article, we present an overview of the new developments in problems of the plasma influence on the effects of gravitational lensing, complemented by pieces of new material and relevant discussions. Deflection of light in the presence of gravity and plasma is determined by a complex combination of various physical phenomena: gravity, dispersion, refraction. In particular, the gravitation...