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Phys Rev Lett
; 87(27 Pt 1): 275001, 2001 Dec 31.
Article
in English
| MEDLINE
| ID: mdl-11800885
ABSTRACT
High confinement [with H = 1, ITERH- 98( y,2)] at beta(N) approximately 2.3 has been found in ASDEX Upgrade discharges with existing (m,n) = (3,2) neoclassical tearing modes (NTMs). The reason for the high confinement at high beta(N) values is a transition of the NTMs into the so-called frequently interrupted regime. In this regime, the NTM growth is frequently interrupted by sudden drops in amplitude. Because of the long NTM growth time, the resulting averaged NTM amplitude remains much smaller than the corresponding saturated value. As this behavior with the beneficial effect on energy confinement has been confirmed at JET, such a high confinement regime at beta(N)>2 might also be expected for ITER.
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Phys Rev A Gen Phys
; 35(10): 4280-4285, 1987 May 15.
Article
in English
| MEDLINE
| ID: mdl-9898018
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