Implosion of Plasma in the Theta Pinch Phenomena

概要

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The implosion of a plasma in the theta pinch is studied by the modified snow plow equations, where finite thickness of the imploding plasma layer is taken into consideration. They are derived from the magnetohydrodynamic equations for the extreme case in which the conductivity of the initial plasma is infinite, and are solved under the approximation of thin layer. When the conductivity of the initial plasma is zero, they can be applied also if the shock front is infinitesimally thin. They reduce to the usual snow plow equation in the limit of zero thickness. It is shown that the layer position, predicted by the usual snow plow model, is between the average radius and the outer radius of the layer. The modified snow plow equations give the knowledges of the exchange of the supplied energy for the kinetic and internal energy, as well as motions of the imploding layer. In the limit of thin layer, the total energy is equally distributed among the kinetic and internal energies.
社団法人日本物理学会の論文
1971-11-05