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On the role of filaments in perpendicular heat transport at the scrape-off layer

D. Carralero, S. Artene, M. Bernert, G. Birkenmeier, M. Faitsch, P. Manz, P. de Marne, U. Stroth, M. Wischmeier, E. Wolfrum2018年被引用 40Nuclear FusionIF 3出版社

In this work we carry out quantitative measurements of particle and heat transport associated to SOL filaments in a tokamak, and relate density shoulder formation to the advection of energy in the far SOL. For the first time, this attempt includes direct measurements of ion and electron temperatures for background and filaments. With this aim, we combine data from a number of equivalent L-mode discharges from the ASDEX Upgrade tokamak in which different probe heads were installed on the midplane manipulator. This approach is validated by a comparison with independent diagnostics. Results indicate an increase of heat transport associated to filaments after the shoulder formation. Several centimeters into the SOL, filaments are still found to carry a substantial fraction (up to one fifth) of the power ejected at the separatrix.

日本語訳

本研究では、トカマクにおけるSOLフィラメントに関連する粒子輸送および熱輸送の定量的測定を行い、密度ショルダー形成を遠方SOLにおけるエネルギーの移流と関連付ける。今回初めて、この試みには背景およびフィラメントのイオン温度と電子温度の直接測定が含まれる。この目的のために、ASDEX Upgradeトカマクの等価なLモード放電からのデータを組み合わせる。これらの放電では、赤道面マニピュレータに異なるプローブヘッドが取り付けられていた。この手法は、独立した診断との比較によって検証される。結果は、ショルダー形成後のフィラメントに関連する熱輸送の増加を示している。SOL内の数センチメートルにおいても、フィラメントはセパラトリックスで排出される電力のかなりの割合(最大5分の1)を運んでいることが見出された。

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asdex-upgrade低精度(概要文一致)

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Scrape-off layerHeat transport
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