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Resolving apparent differences between heat and density pulse propagation in JET and TEXT

A.C.C. Sips, G.M.D. Hogeweij, A.E. Costley, J. O'Rourke, N.J. Lopes Cardozo, J.C.M. de Haas1991年被引用 8Nuclear FusionIF 3出版社

Sawtooth induced heat and density pulse measurements reported in the literature for the JET and TEXT experiments are discussed. In JET the heat pulse travels ten times faster than the density pulse, but in TEXT both pulses travel at the same speed. The measurements are analysed using coupled transport equations for energy and particles. It is shown that the different behaviour of the density pulse in the two experiments can be attributed to differences in the off-diagonal elements of the transport matrix. If the perturbed fluxes of heat and particles are expressed as linear combinations of the thermodynamic forces ∇p and ∇T (rather than ∇n and ∇T), the corresponding transport matrices are remarkably similar. However, minor differences in this transport matrix between JET and TEXT account for the qualitative difference in the density pulses.

日本語訳

JET および TEXT 実験について文献で報告されている、鋸歯状振動によって誘起された熱パルスと密度パルスの測定結果を議論する。JET では熱パルスは密度パルスよりも10倍の速さで伝播するが、TEXT では両パルスは同じ速度で伝播する。これらの測定結果は、エネルギーと粒子の連立輸送方程式を用いて解析される。2つの実験における密度パルスの異なる挙動は、輸送行列の非対角要素の違いに帰因できることが示される。熱と粒子の摂動フラックスを、熱力学的力 ∇p と ∇T(∇n と ∇T ではなく)の線形結合として表すと、対応する輸送行列は著しく類似している。しかしながら、JET と TEXT の間のこの輸送行列のわずかな違いが、密度パルスの定性的な違いを説明する。

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