EUV Spectra of W<sup>13+</sup> Ions in the Large Helical Device: Recent Progress in Observation of Tungsten Ions in Low to Intermediate Charge State Range for Fusion Plasma Diagnostics

Spectroscopic studies of emissions released from tungsten ions combined with a pellet injection technique have been conducted in the Large Helical Device for contribution to the tungsten transport study in tungsten divertor fusion devices and for expansion of the experimental database of tungsten line emissions. Emission lines were explored for the observation of low to intermediate charge states in the range of W10+ to W20+, and the line spectra of W13+ were observed for the first time in fusion plasma experiments. The wavelengths of the observed W13+ lines were 243.1 Å, 247.6 Å, 248.3 Å, and 249.1Å in the extreme ultraviolet wavelength range, and all of them were emission from the 4 f 135s2 - 4 f 135s5p transitions.

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Journal
Plasma and Fusion Research
Published
2025-01-22
DOI
https://doi.org/10.1585/pfr.20.2402009
Primary Topic
Magnetic confinement fusion research
Type
article
Field-Weighted Citation Impact
0.00

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article

EUV Spectra of W13+ Ions in the Large Helical Device: Recent Progress in Observation of Tungsten Ions in Low to Intermediate Charge State Range for Fusion Plasma Diagnostics

T. Oishi, K. Tobita, Hiroyuki Sakaue, I. Murakami et al.
Plasma and Fusion Research
Magnetic confinement fusion research
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EUV Spectra of W13+ Ions in the Large Helical Device: Recent Progress in Observation of Tungsten Ions in Low to Intermediate Charge State Range for Fusion Plasma Diagnostics

T. Oishi, K. Tobita, Hiroyuki Sakaue, I. Murakami, Y. Kawamoto, Tomoko Kawate, Daiji Kato, Ryota NISHIMURA, Nobuyuki Nakamura, Hiroyuki Takahashi, Motoshi GOTO
article en

Abstract

Spectroscopic studies of emissions released from tungsten ions combined with a pellet injection technique have been conducted in the Large Helical Device for contribution to the tungsten transport study in tungsten divertor fusion devices and for expansion of the experimental database of tungsten line emissions. Emission lines were explored for the observation of low to intermediate charge states in the range of W10+ to W20+, and the line spectra of W13+ were observed for the first time in fusion plasma experiments. The wavelengths of the observed W13+ lines were 243.1 Å, 247.6 Å, 248.3 Å, and 249.1Å in the extreme ultraviolet wavelength range, and all of them were emission from the 4 f 135s2 - 4 f 135s5p transitions.

Plasma and Fusion ResearchVol. 20(0)
Kyushu University (JP), National Institutes of Natural Sciences (JP), The Graduate University for Advanced Studies, SOKENDAI (JP), Tohoku University (JP), University of Electro-Communications (JP), National Institute for Fusion Science (JP), EarthTech International (United States) (US)
Korea Institute of Public Finance, Japan Society for the Promotion of Science
Openalex Percentile: Top 99%
Magnetic confinement fusion research
DOIOpen Access PDFOpenAlex
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