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1 - Nuclear Sciences and Applications - IAEA

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152 FUSSMANN et al.<br />

In both regimes the peaking of the n^r) profile correlates with the observed<br />

improvement in confinement. In Fig. 4 TE is plotted versus the profile factor Qn for<br />

all regimes discussed in this paper. In the SOC regime <strong>and</strong> with co-NI the ne(r)<br />

profiles stay flat with Qn « 1.2-1.3 for H + <strong>and</strong> «1.3-1.4 for D + . With IOC or<br />

ctr-NI (up to the highest power levels) peaked nn decreases in the case of enforced density rise.<br />

Transitions between confinement regimes. The development of the improved<br />

confinement regimes presented above may be tentatively described as follows. Upon<br />

reduction of $gas, the particle confinement improves <strong>and</strong> the n

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