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http://ocs.ciemat.es/EPS2019ABS/pdf/P4.1041.pdf
Magnetic plasma confinement systems with conductors embedded into plasma is an important class of magnetic traps with high beta, known as Galateas [1], alternative to the mainstream toroidal system designs. As summarized in [2], Galateas are widely diversified and it provides additional reason to consider them, unlike low-beta traps, as promising systems for many plasma technologies and for advanced fuel reactors while the technical difficulties arising from the magnetic suspension of the embedded conductors ("myxines") and their operation in reactor conditions can be overcome with present-day technologies.
The studies of geometric and other parameters of axisymmetric plasma configurations maintained in an equilibrium by the magnetic field of both plasma current and toroidal currents in the myxines at zero toroidal field is based on the solution of the GradShafranov equation (for recent results see [3,4]). A variety of equilibria with complicated magnetic field surface topology can be realized in Galateas. The use of the unstructured grid ideal MHD stability code MHD_NX [5] makes possible plasma stability studies in Galatea traps [6]. Apart from the localized convective mode stability criteria (like RosenbluthLongmire-Kadomtsev [2]), global mode stability calculations in multiply connected plasma domain can be performed taking into account a gap between the plasma and the vacuum vessel (external modes). For equilibrium configurations in the Galatea magnetic trap "Trimix" [7], the dependence of the growth rates of ideal MHD modes with different toroidal wave numbers on the pressure magnitude is investigated.
Acknowledgement This research is supported by the Russian Science Foundation (Grant No. 16-11-10278).
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