Investigation of Tungsten Unresolved Transition Array Spectrum around 300Å for Fusion Plasma Diagnostics

Tungsten spectroscopic studies have attracted much attention, because tungsten will be used as a plasma-facing component in ITER and future DEMO reactors. However, spectral line data of tungsten ions in low to intermediate charge states, such as W8+-W26+, is still lacking. To accumulate spectral line data of W8+-W26+, it is very important to identify the charge state and transition of Unresolved Transition Array (UTA) spectrum, as well as discrete line spectrum. In this study, we investigated electron temperature dependence of a UTA spectrum around 300Å for an advanced understanding of spectral line shape. As a result, the UTA spectrum contains W17+- W27+ and emission line from 5s-5p transition and its satellite line from 5s2-5s5p transition are strongly emitted. It was suggested that the UTA spectrum around 300Å will be useful for diagnostics of ITER edge plasma.

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Publication Details

Journal
Plasma and Fusion Research
Published
2025-01-22
DOI
https://doi.org/10.1585/pfr.20.2402005
Citations
2
Primary Topic
Magnetic confinement fusion research
Type
article
Field-Weighted Citation Impact
3.74

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article

Investigation of Tungsten Unresolved Transition Array Spectrum around 300Å for Fusion Plasma Diagnostics

T. Oishi, C. Suzuki, Hayato Ohashi, K. Tobita et al.
2 citations
Plasma and Fusion Research
Magnetic confinement fusion research
3.74
article

Investigation of Tungsten Unresolved Transition Array Spectrum around 300Å for Fusion Plasma Diagnostics

T. Oishi, C. Suzuki, Hayato Ohashi, K. Tobita, Hiroyuki Sakaue, Y. Kawamoto, Tomoko Kawate, Daiji Kato, Ryota NISHIMURA, Izumi MURAKAMI, Hiroyuki Takahashi, Gupta SHIVAM, Motoshi GOTO
article en
2 citations

Abstract

Tungsten spectroscopic studies have attracted much attention, because tungsten will be used as a plasma-facing component in ITER and future DEMO reactors. However, spectral line data of tungsten ions in low to intermediate charge states, such as W8+-W26+, is still lacking. To accumulate spectral line data of W8+-W26+, it is very important to identify the charge state and transition of Unresolved Transition Array (UTA) spectrum, as well as discrete line spectrum. In this study, we investigated electron temperature dependence of a UTA spectrum around 300Å for an advanced understanding of spectral line shape. As a result, the UTA spectrum contains W17+- W27+ and emission line from 5s-5p transition and its satellite line from 5s2-5s5p transition are strongly emitted. It was suggested that the UTA spectrum around 300Å will be useful for diagnostics of ITER edge plasma.

Plasma and Fusion ResearchVol. 20(0)
National Institutes of Natural Sciences (JP), The Graduate University for Advanced Studies, SOKENDAI (JP), Tohoku University (JP), National Institute for Fusion Science (JP), University of Toyama (JP), National Cheng Kung University (TW)
Korea Institute of Public Finance, Japan Society for the Promotion of Science
Affordable and clean energy
Openalex Percentile: Top 9%
Magnetic confinement fusion research
3.74
DOIOpen Access PDFOpenAlex
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