Spatiotemporal dynamic characterization of the laser-induced plasma of a mixed material (WCCu) under variable ablation angles in a vacuum

Wu, Huace; Liu, Cong; Wu, Ding; Liu, Shiming; Hu, Zhenhua; Feng, Chao; Hai, Ran; Ding, Fang; Luo, Guang–Nan; Ding, Hongbin

doi:10.1039/d2ja00226d

Cited by 8 publications

(2 citation statements)

References 42 publications

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“…In addition, it should be noted that the measurement information of magnetic field strength and polarity will also have an important impact on the LIBS signal collection and quantitative analysis results. Improper collection method or measurement under the varying magnetic field strength will affect the accuracy of LIBS diagnosis results [49].…”

Section: Determining Magnetic Field Polarity By Spectral Spatial Dist...mentioning

confidence: 99%

A potential optical approach for diagnosis of the local magnetic field near the surface of the first wall/divertor tiles by Zeeman effect using polarization-resolved laser-induced breakdown spectroscopy

Wu,

et al. 2024

Nucl. Fusion

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Magnetic field measurement is the basic diagnosis to obtain the physical engineering parameters of magnetic confinement fusion device and the macro information of plasma discharge. The real-time diagnosis of magnetic field distribution near the plasma-facing components (PFCs) surface provides the important information on the migration and transport model of key elements. In this work, a remote, in-situ approach for the magnetic field measurement near the surface of PFCs by the polarization-resolved laser-induced breakdown spectroscopy (PRLIBS) based on Zeeman effect is proposed and implemented. The Zeeman characteristics of the emission spectra of laser-induced W, Mo and C plasmas were verified in the laboratory by using different magnetic field configurations. According to the polarization characteristics of the Zeeman sublines of the LIBS spectrum, the intensity and direction of the external local magnetic field were successively identified by using a linear polarizer. Subsequently, a linear array fiber was utilized to determine the polarity of the external magnetic field. And finally, the magnetic field intensity near the lower edge surface of the tungsten baffle of the EAST upper divertor was measured when the field coils were demagnetized. This method can supplement the experimental data near the PFCs for the magnetic field configuration of the magnetic confinement fusion device and provide a reference for the wall element analysis model diagnosed by LIBS.

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Section: Determining Magnetic Field Polarity By Spectral Spatial Dist...mentioning

confidence: 99%

A potential optical approach for diagnosis of the local magnetic field near the surface of the first wall/divertor tiles by Zeeman effect using polarization-resolved laser-induced breakdown spectroscopy

Wu,

et al. 2024

Nucl. Fusion

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“…The influence of LA angles on LIBS spectra was investigated by Wu et al 133 This study was related to the application of LIBS under complex working conditions, such as those required for the evaluation of the plasma–wall interaction processes in a Tokamak. The spatiotemporal dynamic evolution of a laser-induced WC/Cu plasma at variable angles was investigated under simulated experimental advanced superconducting Tokamak vacuum conditions.…”

Section: Laser-based Atomic Spectrometrymentioning

confidence: 99%

Atomic spectrometry update: review of advances in atomic spectrometry and related techniques

Evans

Pisonero

Smith

et al. 2023

J. Anal. At. Spectrom.

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Quantitative analysis of impurities deposited on the Plasma-Facing Components of EAST tokamak using a portable LIBS device

Hu,

Bai,

et al. 2024

Nuclear Materials and Energy

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Spatiotemporal dynamic characterization of the laser-induced plasma of a mixed material (WCCu) under variable ablation angles in a vacuum

Abstract: The real-time composition information of the surfaces of the plasma-facing components (PFCs) in the tokamak, especially the divertor region, is of great significance for understanding and revealing the plasma-wall interaction...

Cited by 8 publications

References 42 publications

A potential optical approach for diagnosis of the local magnetic field near the surface of the first wall/divertor tiles by Zeeman effect using polarization-resolved laser-induced breakdown spectroscopy

A potential optical approach for diagnosis of the local magnetic field near the surface of the first wall/divertor tiles by Zeeman effect using polarization-resolved laser-induced breakdown spectroscopy

Atomic spectrometry update: review of advances in atomic spectrometry and related techniques

Quantitative analysis of impurities deposited on the Plasma-Facing Components of EAST tokamak using a portable LIBS device

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