Measurement of Space Potential Fluctuations During MHD Activities in a Toroidal Helical Plasma with a Heavy Ion Beam Probe

概要

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A heavy ion besttaa prolce (HIBP) is a ttnicjtre di?tgr?ostic instruuaaent which c?rn raaeastrre localplasma potential and its fltrcttrations. However, in the presetace of' IVIHD activities, accelerationor deceleration of Tcoth priraaary and secondary be?tttxs are catrsed lay tl'ae fltrcttrating vector po-LenCiaI OA/Ot along the l)C21111 trar.jectories (path irategr;tl efl'ect). Such effect possibly iuadtrcesJl contanaaination to Sp2lC(IB potential zaaeastureuaaent. XN7e h?xve evaltrated those efl'ects dtrring abursting IVIHD instability in the Cozaapact Helic?xl System (CHS), which is considered to be anruin = 2/l interchange instability. In this procedure, the vector potenti?tl profile is estinaatedbotla theoretically and exjcerimentally. Contribution frotta path efl'ect is found to be less thanseveral percent to the taaeastrred sjcace potential fltncrttrattion. Then Sp2lCC potential fltzctuation isfotrnd to be localized atrotrnd q :: 2 raaagnetic strrface, which is consistent with a uaaodel f'or theinterchan'e tnode.
社団法人日本物理学会の論文
1998-09-15