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A semi-empirical theory for global energy confinement in the stellarator W7-AS is presented. It employs elementary rules of probability theory together with the transformation properties of the basic equations describing plasma behaviour. The semi-empirical theory allows model comparison between four different kinetic plasma models. The analysis is applied to the 153 t =1/3 W7-AS data documented in the international stellarator database. It is found that the collisional low-beta kinetic model describes best the physics pf W7-AS energy confinement. Finally, the predictive power of the semi-empirical theory is successfully tested in the prediction of the energy content in density and power scans performed in W7-AS.

Additional information

Authors: PREUS R, Max-Planck-Institut fur Plasma physik, Garching bei Munchen (DE);DOSE V, Max-Planck-Institut fur Plasma physik, Garching bei Munchen (DE)
Bibliographic Reference: Article: Nuclear Fusion, 39 (1999) 7, 849-861
Record Number: 199911212 / Last updated on: 1999-08-27
Original language: en
Available languages: en
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