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In contemporary tokamak experiments with additional heating, large toroidal flows may develop, with associated smaller poloidal flows, which may drastically change the original equilibrium approach to the study of plasma behaviour. This report applies the extended Grad-Shafranov-Schluter (EGSS) equation to this situation. It is found that EGSS equations offer many branches of solutions which, even for small poloidal velocity, correspond in general to two elliptic regions and two hyperbolic regions. Every elliptic branch may additionally bifurcate into stable and non-stable branches. A preliminary version of a computer program for solution of these equations using inverse method and Fourier decomposition, has been delivered and is operational in JET. The results of test cases are presented and show that the poloidal flow causes a separation of the surfaces of constant density from the magnetic surfaces, as well as separation of the density axis from the magnetic axis.

Additional information

Authors: ZELAZNY R, JET Joint Undertaking, Abingdon, Oxon (GB);STANKIEWICZ R, JET Joint Undertaking, Abingdon, Oxon (GB);POTEMPSKI S, JET Joint Undertaking, Abingdon, Oxon (GB)
Bibliographic Reference: Report: JET-R(88)16 EN (1988)
Availability: Available from the Publications Officer, JET Joint Undertaking, Abingdon, Oxon. OX14 3EA (GB)
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