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Conductivity and transport in neon deuterium discharges in the PLT tokamak

E. Meservey, M. Bitter, C. Daughney, D. Eames, P. Efthimion, E. Hinnov, R. Hulse, D. Post, K. Sato, S. Suckewer1984年被引用 18Nuclear FusionIF 3出版社

Introduction of large amounts of neon into Ohmically heated deuterium discharges in the PLT tokamakl results in higher central electron temperature (Te(0) ≅ 3 keV) and values of electron energy containment time that are larger than in regular discharges at the same electron density (τEe = 44 ms at e = 2 × 1019 m−3). For steady-state discharges with high effective Z (∼ 5–8) the conductance is larger than that predicted by neoclassical theory by as much as a factor of two. Transport rates of hydrogen-like and helium-like ions can be fairly well approximated by assuming a diffusion constant of between 0.4 and 1 m2·s−1. Within experimental uncertainties the diffusion of hydrogen-like neon is the same for co- and counter-directed high-power neutral beams.

日本語訳

PLTトカマクにおけるオーミック加熱重水素放電への大量のネオン注入により、中心電子温度(Te(0) ≅ 3 keV)が上昇し、同じ電子密度(τEe = 44 ms at e = 2 × 1019 m−3)における通常放電と比較して電子エネルギー閉じ込め時間の値が大きくなった。高実効Z(∼ 5–8)の定常放電では、コンダクタンスは新古典理論の予測値よりも最大で2倍大きい。水素様およびヘリウム様イオンの輸送速度は、拡散定数を0.4〜1 m2·s−1と仮定することでかなり良好に近似できる。実験的不確実性の範囲内では、水素様ネオンの拡散は、同方向および逆方向の高パワー中性粒子ビームに対して同じである。

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