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Turbulent transport of MeV range cyclotron heated minorities as compared to alpha particles

István Pusztai, George J Wilkie, Yevgen O Kazakov, Tünde Fülöp2016年Plasma Physics and Controlled FusionIF 2.2出版社

We study the turbulent transport of an ion cyclotron resonance heated (ICRH), MeV range minority ion species in tokamak plasmas. Such highly energetic minorities, which can be produced in the three ion minority heating scheme (Kazakov et al (2015) Nucl. Fusion55 032001), have been proposed to be used to experimentally study the confinement properties of fast ions without the generation of fusion alphas. We compare the turbulent transport properties of ICRH ions with that of fusion born alpha particles. Our theoretical predictions indicate that care must be taken when conclusions are drawn from experimental results: while the effect of turbulence on these particles is similar in terms of transport coefficients, differences in their distribution functions—ultimately their generation processes—make the resulting turbulent fluxes different.

日本語訳

我々は、トカマクプラズマにおけるイオンサイクロトロン共鳴加熱(ICRH)されたMeV領域の少数イオン種の乱流輸送を研究する。このような高エネルギーの少数種は、三イオン少数種加熱スキーム(Kazakov et al (2015) Nucl. Fusion55 032001)によって生成可能であり、核融合生成アルファ粒子を伴わずに高速イオンの閉じ込め特性を実験的に研究するために提案されている。我々は、ICRHイオンの乱流輸送特性を核融合生成アルファ粒子のそれと比較する。我々の理論的予測は、実験結果から結論を導き出す際には注意が必要であることを示している:乱流がこれらの粒子に及ぼす影響は輸送係数の観点では類似しているものの、それらの分布関数——究極的にはその生成過程——の違いにより、結果として生じる乱流フラックスは異なるものとなる。

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