Dynamics of shear Alfvén waves and energetic particles are crucial to the performance of
burning fusion plasmas. This article reviews linear as well as nonlinear physics of shear …

At the beginning of a machine operation, an assessment of the intrinsic error fields, spurious
magnetic field perturbations which can affect plasma dynamics, is often carried out by …

Investigations of beta-induced Alfvén eigenmodes (BAEs) destabilized by resonant
magnetic perturbations (RMPs) have been conducted on the J-TEXT tokamak. In the Ohmic …

Experimental observation and theoretical analysis are presented for the nonlinear mode
couplings between shear Alfvén wave and magnetic island. In the sub-Alfvén frequency …

The localized coupling among geodesic acoustic mode (GAM), tearing modes (TMs) and
twin counter-propagating beta-induced Alfvén eigenmodes (BAEs) waves has been …

Spontaneous increases in plasma density, up to∼ 1.6 times the Greenwald value, are
observed in FTU with lithized walls. These plasmas are characterized by profile peaking up …

Beta-induced Alfvén eigenmodes (BAEs) during strong tearing modes are investigated on
the EAST tokamak systematically, and the relation between the BAE frequencies and …

The effect of a magnetic island chain on the shear Alfvén continuum is calculated
analytically. Using a WKB approximation of the linearized ideal MHD equations, the island is …

A numerical approach is devised to calculate the shear Alfvén continuum inside and outside
magnetic islands in cylindrical and stellarator plasmas. Equations for an appropriate set of …

A finite-mass electron fluid model for low frequency electromagnetic fluctuations, particularly
the collisionless tearing mode, has been implemented in the gyrokinetic toroidal code. Using …