磁場閉じ込めプラズマにおける古典的非局所現象 : 磁力線に沿った運動が関与する非局所輸送

概要

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Transport along field lines in magnetic confinement plasmas is reviewed. Collisionless and collisional-diffusive transports are discussed. As a result of rapid transport, features of plasmas along field lines are apt to behave nonlocally. A nonlocal phenomenon of scrape-off layer (SOL) and divertor plasmas in a tokamak is introduced, whose asymmetry along field lines is induced by thermoelectric instability related to the SOL current. A local phenomenon called MARFE can be brought by the strong radiation cooling. The ”snake”, a nonlocal feature along field lines but with local structure perpendicular to the field, is observed in a tokamakcoreplasma. For mirror-confined plasmas, axial particle losses from the mirror ends, especially pitch-angle-scattering losses into the loss cone and nonadiabatic losses due to the breakdown of adiabaticity of the magnetic moment, are discussed in relation to nonlocal axial transport.
プラズマ・核融合学会の論文
2002-09-25