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Development of a Visco-Mach probe for the simultaneous measurement of viscosity and flow velocity in tokamak edge plasma

Kyu-Sun Chung1994年被引用 7Nuclear FusionIF 3出版社

Without a knowledge of the normalized viscosity, a Mach probe may be just a directional probe or a flow meter with large uncertainties. To solve this problem, a Visco-Mach probe has been developed to measure the normalized viscosity ( alpha ) and flow Mach number (Minfinity ) simultaneously. By generating a free pre-sheath and a bounded pre-sheath by a small Mach probe (SMP) within a free pre-sheath generated by a large Mach probe (LMP), one can measure two ratios of current densities: one Rs by the SMP, and the other Rl by the LMP. Then simultaneous deduction of alpha and Minfinity is made by an iteration scheme from Rs and Rl. The applicability of this new probe to the reciprocating probe of JET is discussed

日本語訳

知識なしに正規化粘性を考慮すると、マッハプローブは単なる方向プローブまたは流量計に過ぎず、大きな不確実性を伴う可能性がある。この問題を解決するために、粘性マッハプローブが開発され、正規化粘性(α)と流れマッハ数(M∞)を同時に測定できるようになった。小型マッハプローブ(SMP)と大型マッハプローブ(LMP)によって自由プレシースと有界プレシースを生成し、SMPによる電流密度比RsとLMPによる電流密度比Rlの2つの比を測定することで、反復スキームを用いてαとM∞を同時に導出できる。この新しいプローブのJETの往復プローブへの適用可能性について議論する。

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