New Scalings of Energy Confinement Time of RFP Plasmas and the Extrapolation to Reactor Relevant Region

概要

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Data bases of reversed field pinch(RFP)plasma have been gradually accumulated by recent experiments of several RFP devices. New confinement scalings τ^<RFP s1>_E=0.024Aa^2I_p/P^<1/2>_<heat>, τ^<RFP s2>_E=0.04s(I_N)Aa^2I^<1.25>_p/P^<1/2>_<heat> which are consistent to the recent data are presented, where units are in [s], [m], [MA]and[MW]respectively and s(I_N)is a correction function of I_N≡I_p/(πa^2<n_e>_<20>). From the standpoint of new scalings, dependences among parameters of possible RFP reactors are analyzed to find the conditions for RFP reactors. H_<s1>, H_<s2> are defined by the ratios of necessary energy confinement time for RFP reactors for burning against τ^<RFP s1> and τ^<RFP s2> respectively. When confinement time follows τ^<RFP s1>_E scaling, confinement enhancement factor of at least H_<s1>=2〜3 is necessary for RFP reactors to be realistic. When confinement time follows τ^<RFP s2>_E scaling, data points in I_p-a space of RFP reactors are within the region of target.
社団法人プラズマ・核融合学会の論文
1999-03-25