volume 42, issue 1, P52-58 2002
DOI: 10.1088/0029-5515/42/1/308
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Abstract: Densities up to 40 percent above the Greenwald limit are reproducibly achieved in high confinement (H ITER89p = 2) ELMing H-mode discharges. Simultaneous gas fueling and divertor pumping were used to obtain these results. Confinement of these discharges, similar to moderate density H-mode, is characterized by a stiff temperature profile, and therefore sensitive to the density profile. A particle transport model is presented that explains the roles of divertor pumping and geometry for access to high densities. …

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