欧姆和高约束模等离子体的Alcator C-Mod刮擦层中的斑点速度和大小

IF 2.3 2区物理与天体物理 Q1 NUCLEAR SCIENCE & TECHNOLOGY

Nuclear Materials and Energy Pub Date : 2025-04-11 DOI:10.1016/j.nme.2025.101930

A.D. Helgeland , J.M. Losada , J.L. Terry , O.E. Garcia

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引用次数: 0

摘要

采用一种改进的时间延迟估计方法，计算了一欧姆和二高约束等离子体（h模）在Alcator C-Mod刮擦层中的跨场斑点运动速度；一个边缘局域模式自由和一个增强的d - α h模式。气喷成像数据分析结果在一个随机模型的框架内解释，该模型将波动描述为不相关的斑点状结构的叠加。在所研究的所有约束模式中，刮擦层主要由振幅较大的斑点状细丝以400至1000m/s的速度向外径向移动。高约束模式等离子体中的斑点具有与欧姆等离子体相似的速度和大小，这与所研究的约束模式的条件平均爆发形状和频谱的密切相似性是一致的。

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Blob velocities and sizes in the Alcator C-Mod scrape-off layer for ohmic and high confinement mode plasmas

An improved time delay estimation method is used to calculate the velocity of cross-field blob motion in the scrape-off layer of Alcator C-Mod for an ohmic and two high confinement (H-mode) plasmas; an edge localized mode free and an enhanced D-alpha H-mode. The gas puff imaging data analysis results are interpreted in the framework of a stochastic model that describes the fluctuations as a super-position of uncorrelated blob-like structures. In all confinement modes investigated, the scrape-off layer is dominated by large amplitude, blob-like filaments moving radially outwards with velocities in the range from 400 to

1000 m/s

. Blobs in high confinement mode plasmas have similar velocities and sizes as in ohmic plasma, which is consistent with the close similarity of conditionally averaged burst shapes and frequency spectra for the confinement modes investigated.

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来源期刊

Nuclear Materials and Energy Materials Science-Materials Science (miscellaneous)

CiteScore

3.70

自引率

15.40%

发文量

175

审稿时长

20 weeks

期刊介绍： The open-access journal Nuclear Materials and Energy is devoted to the growing field of research for material application in the production of nuclear energy. Nuclear Materials and Energy publishes original research articles of up to 6 pages in length.