Home / Store / Journals / Electronic Articles / Fusion Science and Technology / Volume 59 / Number 1T
V. V. Arsenin, P. N. Terekhin
Fusion Science and Technology
Volume 59 / Number 1T / January 2011 / Pages 193-195
Format:electronic copy (download)
Conditions for convective plasma stability in a system of coupled axisymmetric open traps with sign-alternative curvature of magnetic field are analyzed both in the MHD model and the Kruskal–Obereman kinetic model. For a couple of nonparaxial simple mirror cell and a semicusp, the “radial' interval where a hollow plasma can be stable is determined, as well as the range in which the ratio of the pressures in component cells should lie. Both external and internal plasma boundaries are stable in accordance with the average minB principle, provided that the pressure profiles in the cells are made consistent. The plasma compressibility plays an essential role. The stability of the cells against the global mode (as in the Ryutov–Stupakov trap) is sufficient but not necessary for stabilizing the chain. For the couple under consideration, the stability margin is not small.
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