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1 - Nuclear Sciences and Applications - IAEA

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<strong>IAEA</strong>-CN-50/A-IV-2 237<br />

finement. The improvement lessens with rising heating power. The ion confinement<br />

becomes neoclassical in agreement with r7i-mode theory. Tlie global energy confinement,<br />

however, remains controlledby electron transport <strong>and</strong> is characterized by a nearly<br />

self-similar electron temperature profile. This leads to a picture where the energy confinement<br />

is nearly determined by the boundary temperature <strong>and</strong> the density profile.<br />

High-Z impurities accumulate in the centre according to neoclassical theory.<br />

REFERENCES<br />

[1] NOTERDAEME, J.-M., et al., Paper <strong>IAEA</strong>-CN-50/E-H-2, these Proceedings, Vol. 1.<br />

[2] NIEDERMEYER, H., Plasma Phys. Controll. Fusion, to be published.<br />

[3] KAUFMANN, M., et al., Nucl. Fusion 28 (1988) 827.<br />

[4] FUSSMANN, G., et al., in Plasma-Surface Interactions in Controlled Fusion Devices (Proc. 8th<br />

Int. Conf. Jiilich, 1988), <strong>and</strong> references therein.<br />

[5] GRUBER, O., et al., in Controlled Fusion <strong>and</strong> Plasma Heating (Proc. 15th Eur. Conf. Dubrovnik,<br />

1988), Vol. 12B, Part I, European Physical Society (1988) 23.

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