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Suppression of core temperature fluctuations by edge cooling in the J-TEXT tokamak

Y Y Xie, K J Zhao, Z J Yang, Z P Chen, J Q Dong, Z Y Chen, Yuejiang Shi, M Z Tan, L Gao, Y H Ding2025年1月Plasma Physics and Controlled FusionIF 2.2出版社

The suppression of core temperature fluctuations due to edge cooling in the J-TEXT tokamak is presented. The supersonic molecular beam is injected into the low density plasmas and the core temperature rise appears. The staggered time correlation technique is utilized to infer the temperature fluctuations from an electron cyclotron emission radiometer (ECE). The existing correlation ECE (CECE) also enables the observation of the temperature fluctuations simultaneously. A significant flattening of the density gradients appears almost in the whole plasmas after the cold pulse injection. The behaviors of the temperature fluctuations from both ECE and CECE show a good agreement, except for the fluctuation level, which exhibits a relative variation of approximately 10%50%. The relative intensity of temperature fluctuations decreases within the surface of 0.8 due to the edge cooling. The cross-power analysis and the agreement in measurements suggest that temperature fluctuations from turbulence inferred from a single ECE channel may be possible. Linear simulations suggest the drop in temperature fluctuation intensity may relate to the trapped electron mode turbulence stabilization. This paper also demonstrates the evolution of both gradients and fluctuations before and after supersonic molecular beam injection with density scans.

日本語訳

J-TEXTトカマクにおけるエッジ冷却によるコア温度揺動の抑制について提示する。低密度プラズマに超音速分子ビームを入射すると、コア温度の上昇が現れる。スタッガード時間相関法を用いて、電子サイクロトロン放射計(ECE)から温度揺動を推定する。既存の相関ECE(CECE)も同時に温度揺動の観測を可能にする。冷パルス入射後、密度勾配の顕著な平坦化がほぼ全プラズマに現れる。ECEとCECEの両方からの温度揺動の挙動は、約10%~50%の相対変動を示す揺動レベルを除いて、良い一致を示す。エッジ冷却により、温度揺動の相対強度は0.8の表面内で減少する。相互パワー解析と測定の一致は、単一のECEチャンネルから推定される乱流由来の温度揺動が可能であることを示唆する。線形シミュレーションは、温度揺動強度の低下が捕捉電子モード乱流の安定化に関連する可能性を示唆する。本論文はまた、密度走査を伴う超音速分子ビーム入射の前後における勾配と揺動の両方の時間発展を実証する。

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TEXTJ-TEXT

AIによる論文要約

コア温度変動の抑制による端部冷却 - J-TEXT トカマクにおける研究
JAこの論文は、核融合プラズマの物理と制御に興味のある研究者や学生に役立つでしょう。特に、プラズマ温度変動の観測と抑制手法について学べます。#プラズマ温度変動 #端部冷却 #J-TEXTトカマク #核融合プラズマ物理
LLM向け: {'Title': 'コア温度変動の抑制による端部冷却 - J-TEXTトカマクにおける研究', 'Author(s)': '不明', 'Research Ob…

この研究では、J-TEXTトカマクにおいて、端部冷却によるコア温度変動の抑制について報告しています。超音速分子ビームを低密度プラズマに注入すると、コア温度が上昇し、温度変動が観測されます。電子サイクロトロン放射計を使って温度変動を測定し、端部冷却により変動が抑制されることを示しています。この研究は、プラズマ温度変動の理解と制御に役立ちます。

Suppression of core temperature fluctuations by edge cooling in the J-TEXT tokamak
ENThis paper would be of interest to fusion researchers studying plasma turbulence, edge cooling, and the effects of density and temperature gradients on plasma stability. It provides insights that could help improve the performance and stability of tokamak devices.#FusionResearch #PlasmaPhysics #TurbulenceStabilization #EdgeCooling #J-TEXTTokamak
LLM向け: {'Title': 'Suppression of core temperature fluctuations by edge cooling in the J…

This paper reports on the suppression of core temperature fluctuations due to edge cooling in the J-TEXT tokamak. Supersonic molecular beam injection into low-density plasmas led to a flattening of density gradients and a decrease in temperature fluctuation intensity within the 0.8 surface, likely due to stabilization of trapped electron mode turbulence.

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