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Effect of finite ϵ β ρ on the ion temperature gradient mode in a tokamak

1991; IOP Publishing; Volume: 31; Issue: 5 Linguagem: Inglês

10.1088/0029-5515/31/5/012

1741-4326

M. S. Chu, R. R. Dominguez,

Particle accelerators and beam dynamics

The ion temperature gradient (ITG) driven mode (or ηi mode) is studied for a tokamak where the pressure gradient is sufficiently large (βρ ∼ 1) to modify the local shear and the gradient of the magnetic field strength. It is found that these two diamagnetic modifications of the plasma equilibrium have a stabilizing effect on the ITG mode. This could contribute to the good edge confinement observed in the H-mode and the improvement of ion energy confinement in a second stability regime tokamak.