Drift of ablated material after pellet injection in a tokamak

Effect of Transport Processes on Tokamak Refueling by Pellet Injection

Lithium Pellet Injection Experiments on the Alcator C-mod Tokamak Lithium Pellet Injection Experiments on the Alcator C-mod Tokamak Lithium Pellet Injection Experiments on the Alcator C-mod Tokamak

A pellet enhanced performance (PEP) mode, showing significantly reduced core transport, is regularly obtained after the injection of deeply penetrating lithium pellets into Alcator C-Mod discharges. These transient modes, which typically persist about two energy confinement times, are characterized by a steep pressure gradient (p <; a/5) in the inner third of the plasma, indicating the presence...

Lithium Pellet Injection Experiments

A pellet enhanced performance (PEP) mode, showing significantly reduced core transport, is regularly obtained after the injection of deeply penetrating lithium pellets into Alcator C-Mod discharges. These transient modes, which typically persist about two energy confinement times, are characterized by a steep pressure gradient (4, <a/5) in the inner third of the plasma, indicating the presence ...

Drift-tearing magnetic islands in tokamak plasmas

A systematic fluid theory of nonlinear magnetic island dynamics in conventional low, large aspect-ratio, circular cross-section tokamak plasmas is developed using an extended magnetohydrodynamics model that incorporates diamagnetic flows, ion gyroviscosity, fast parallel electron heat transport, the ion sound wave, the drift wave, and average magnetic field-line curvature. The model excludes th...

Drift Ballooning Instabilities in Tokamak Edge Plasmas

The linear stability of high-toroidal-number drift-ballooning modes in tokamaks is investigated with a model that includes resistive and viscous dissipation, and assumes the mode frequency to be comparable to both the sound and diamagnetic frequencies. The coupled effect of ion drift waves and electron drift-acoustic waves is shown to be important, resulting in destabilization over an intermedi...