EDA H 模式中准相干模式的多面性

IF 3.5 1区物理与天体物理 Q1 PHYSICS, FLUIDS & PLASMAS

Nuclear Fusion Pub Date : 2024-09-06 DOI:10.1088/1741-4326/ad751b

G. Grenfell, L. Gil, P. Manz, C. Silva, J. Adamek, D. Brida, G.D. Conway, T. Eich, M. Faitsch, T. Happel, M. Spolaore, U. Stroth, B. Tal, B. Vanovac, E. Wolfrum, the ASDEX Upgrade Teama, the EUROfusion Tokamak Exploitation Teamb

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引用次数: 0

摘要

为了将增强型 D-Alpha H 模式扩展到未来的设备，了解这一机制的主要特征--准相干模式（QCM）--的特性至关重要，它可能会将压力梯度限制在理想磁流体力学极限以下。通过 ASDEX 升级版中的扫描探针对 QCM 的湍流特性进行了研究。分析表明，该模式具有多面性，既横跨约束区（径向电场为负值），也横跨近刮除层（SOL）（径向电场为正值）。QCM 频率下的密度和电势波动与约束区的反相关性更强，这是电磁不稳定性的特征；而在 SOL 中，它们的相关性则更强，这也是漂移波的预期特征，从而诱发了跨越分离矩阵的跨场传输。

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The multi-faced nature of the quasicoherent mode in EDA H-mode

In order to extend the enhanced D-Alpha H-mode to future devices, it is crucial to understand the properties of the main signature of this regime, the quasicoherent mode (QCM), that likely clamps the pressure gradient below the ideal magnetohydrodynamic limit. The turbulent character of the QCM is investigated with scanning probes in ASDEX Upgrade. Analysis reveals the multi-faced character of the mode that spans both the confined region (where the radial electric field is negative) and the near scrape-off layer (SOL) (where it is positive). Fluctuations of density and potential at the QCM frequency are more anti-correlated towards the confined region, which is a fingerprint of electromagnetic instabilities, while they become more correlated in the SOL, as expected for a drift-wave, inducing cross-field transport across the separatrix.

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来源期刊

Nuclear Fusion 物理-物理：核物理

CiteScore

6.30

自引率

39.40%

发文量

411

审稿时长

2.6 months

期刊介绍： Nuclear Fusion publishes articles making significant advances to the field of controlled thermonuclear fusion. The journal scope includes: -the production, heating and confinement of high temperature plasmas; -the physical properties of such plasmas; -the experimental or theoretical methods of exploring or explaining them; -fusion reactor physics; -reactor concepts; and -fusion technologies. The journal has a dedicated Associate Editor for inertial confinement fusion.