Microinstability,Entropy Production and Plasma Confinement

概要

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A variational method to obtain the plasma confinement properties in magneticfusion devices is proposed. The most probable steady state of an inhomogeneousplasma open to external sources is seeked out by using a non-equilibrium ther-modynamical and statistical mechanical approach. As a thermodynamical po-tential to cause anomalous loss fluxes, an irreversible entropy production rateis used, which is associated with the dissipation due to low-frequency electro-magnetic fluctuations in the presence of the pressure inhomogeneity. Its condi-tional minimum (extremum) state, with respect to the finite inhomogeneitiesof the plasma parameters and the distribution of the fluctuation spectrum, cor-responds to the required steady state of a dissipative structure. An externalsource condition is included as a constraint which makes an effective change ofthe potential.
社団法人日本物理学会の論文
1982-10-15