利用快速相机进行相干模式和湍流测量。

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2024-09-01 DOI:10.1063/5.0219330

Gustavo E Bartolo, Sonu Yadav, Chloelle Fitz, Earl E Scime

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引用次数: 0

摘要

这项研究采用了一台帧频高达 900,000 帧/秒的快速相机，来测量氦光源等离子体和通量绳合并过程中跨空间尺度的能量传递，并测量氦光源等离子体中的方位模结构。通过提取像素级频散关系和功率谱密度测量值，我们测量了等离子体中广泛空间尺度范围内的湍流波模式和能量分布细节。我们证实了螺旋子等离子体中漂移波的存在，以及在螺旋子和通量绳合并实验中，在电子表皮深度尺度的 PSD 中存在强耗散区域。这种方法克服了传统探测器的许多局限性，在不扰动等离子体的情况下提供了很高的空间和时间分辨率。

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Coherent mode and turbulence measurements with a fast camera.

This study employs a fast camera with frame rates up to 900,000 fps to measure the transfer of energy across spatial scales in helicon source plasmas and during flux rope mergers and the measurement of azimuthal mode structures in helicon plasmas. By extracting pixel-scale dispersion relations and power spectral density (PSD) measurements, we measure the details of turbulent wave modes and energy distribution across a broad range of spatial scales within the plasma. We confirm the presence of drift waves in helicon plasmas, as well as the existence of strong dissipation regions in the PSD at electron skin depth scales for both helicon and flux rope merger experiments. This approach overcomes many limitations of conventional probes, providing high spatial and temporal resolution, without perturbing the plasma.

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.