On Greenwald density limit in H-mode

Tokar, M. Z.
February 2009
Physics of Plasmas;Feb2009, Vol. 16 Issue 2, pN.PAG
Academic Journal
The experimental Greenwald density limit in tokamak H-mode is explained from the requirements that in the edge transport barrier the radial pressure gradient does not exceed the ballooning stability threshold and the plasma collisionality corresponds to the transition from the plateau regime of neoclassical transport to the Pfirsch–Schlüter one, where the edge temperature and plasma energy content decrease dramatically with increasing density.


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