Abstract
Long timescale density peaking has been observed in JET plasmas leading to densities exceeding the Greenwald value. These neutral beam heated discharges are characterized by type-I ELMs and good energy confinement. Central density is limited by neoclassical tearing modes or by termination of H-mode preceded by loss of sawteeth. When these limiting factors are avoided (i.e. at intermediate power level and with optimization of gas puffing) quasi-stationary high density plasmas with peaked density profile are obtained.
Original language | English |
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Pages (from-to) | 1911-1917 |
Number of pages | 7 |
Journal | Plasma Physics and Controlled Fusion |
Volume | 44 |
Issue number | 9 |
DOIs | |
State | Published - Sep 2002 |
Externally published | Yes |