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Reversed magnetic shear scenario development in NSTX-U using TRANSP

M.E. Galante, M.D. Boyer, I.U. Uzun-Kaymak, E.L. Foley, B.P. LeBlanc, F.M. Levinton2025年2月Nuclear FusionIF 3出版社

Understanding and control of electron thermal transport is a critical point of research in magnetic fusion experiments. Previous experiments have shown that operation with reversed magnetic shear (RMS) can suppress electron thermal transport, resulting in the generation of internal transport barriers (ITBs), with the location of the ITB correlated with the location of minimum magnetic shear. The recent upgrades to NSTX—increased magnetic field up to 1 T, increased plasma current up to 2 MA, 2nd neutral beam—present an increased operating space in which to explore electron thermal transport in RMS plasmas. Utilizing TRANSP, we have developed operating scenarios by which to generate RMS in NSTX-U. The results suggest that RMS in NSTX-U can be generated through fast current ramp and early beam injection into a large plasma volume. This is very similar to the procedure that was followed in both TFTR and NSTX to generate RMS. Sustainment of RMS, disregarding non-( = 1) MHD events, requires maintaining a large plasma volume, and increasing the core , either via increased plasma current and/or adding heating power. Using this procedure, RMS was sustained for ∼1 s, with 1 for that period.

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nstx-u高精度(タイトル一致)tftr中精度(概要文一致)

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NSTXMagnetic shearReversed magnetic shearNSTX-U

AIによる論文要約

NSTX-Uにおける逆磁気シアシナリオの開発
JAこの論文は、磁場閉じ込めプラズマの物理や制御に興味のある核融合研究者に有益です。特に、プラズマ閉じ込めの改善や内部輸送障壁の生成に関心のある研究者に役立つでしょう。#PlasmaConfinement #InternalTransportBarrier #ReversedMagneticShear
LLM向け: {'Title': 'NSTX-Uにおける逆磁気シアシナリオの開発', 'Author(s)': '不明', 'Research Objective': 'NS…

この論文は、NSTX-Uで逆磁気シア(RMS)を生成し維持する方法について述べています。RMSはプラズマ閉じ込めを改善し、内部輸送障壁を生成することが知られています。TRANSP解析の結果、急速な電流立ち上げと早期のビーム入射により、NSTX-Uでもこのようなシナリオが実現できることが示されました。さらに、大きなプラズマ体積の維持と加熱パワーの増加がRMSの持続には重要であることが分かりました。

Developing a Reversed Magnetic Shear Scenario in NSTX-U Using TRANSP
ENThis paper is of interest to fusion researchers and students studying plasma physics and transport phenomena in fusion devices. It provides insights into the operational scenarios and challenges in achieving and maintaining RMS, which is an important topic in fusion energy research.#FusionPlasmaPhysics #InternalTransportBarriers #ReversedMagneticShear #NSTX-U
LLM向け: {'Title': 'Developing a Reversed Magnetic Shear Scenario in NSTX-U Using TRANSP'…

This paper explores the generation and sustainment of reversed magnetic shear (RMS) in the NSTX-U fusion experiment using the TRANSP simulation tool. RMS can suppress electron thermal transport, leading to the formation of internal transport barriers. The authors demonstrate that RMS can be achieved through a fast current ramp and early beam injection, similar to previous experiments. Maintaining a large plasma volume and increasing core heating are key to sustaining RMS in NSTX-U.

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