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Broad wavenumber turbulence measurements during neutral beam injection on the DIII-D Tokamak

T.L. Rhodes, W.A. Peebles, M.A. Van Zeeland, J.S. deGrassie, G.R. McKee, G.M. Staebler, J.C. DeBoo, E.J. Doyle, M. Gilmore, P. Gohil2007年被引用 12Nuclear FusionIF 3出版社

Density fluctuation measurements covering a wavenumber range relevant to ITG, TEM and ETG type instabilities (k⊥ ρi ≈ 0.2→ 10) are compared during Ohmic and neutral beam injection (NBI). These short time duration NBI perturbations modified the background temperature as well as the density fluctuation behaviour but had little effect on the background density. It is found that both the measured and calculated responses to these perturbations varied with wavenumber supporting the need for broad wavenumber comparisons. The experimentally measured fluctuation changes and calculated growth rates (from the linear gyrokinetic code GKS) show qualitative similarities to each other at low and intermediate k while the comparison at high k is inconclusive.

日本語訳

ITG、TEM、およびETGタイプの不安定性に関連する波数範囲(k⊥ρi ≈ 0.2→10)をカバーする密度揺動測定を、オーミック加熱時と中性粒子ビーム入射(NBI)時に比較した。これらの短時間のNBI摂動は、背景温度および密度揺動の挙動を変化させたが、背景密度にはほとんど影響を与えなかった。これらの摂動に対する測定応答と計算応答の両方が波数によって変化することが見出され、広い波数範囲での比較の必要性が支持された。実験的に測定された揺動変化と(線形ジャイロ運動論コードGKSによる)計算成長率は、低波数および中間波数において互いに定性的な類似性を示す一方、高波数での比較は決定的ではなかった。

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diii-d高精度(タイトル一致)

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DIII-DNeutral beamNeutral beam injection
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