Measurement of Paα line from pellet ablation cloud in Heliotron J
The Paα line (1875.13 nm) in the near-infrared (NIR) region was evaluated to apply Stark broadening of the line spectrum to the electron density measurement of the small-pellet ablation cloud in Heliotron J, a medium-sized helical-axis heliotron device. Paα is three-to-four times broader than the visible Hβ line (486.13 nm) for the same electron density. Using a portable NIR spectrometer, preliminary proof-of-concept experiments determined the marginal density, below which the broadening was undetectable. The lower detection density limit can be decreased using a narrower entrance slit or a denser grating.
Medienart: |
E-Artikel |
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Erscheinungsjahr: |
2022 |
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Erschienen: |
2022 |
Enthalten in: |
Zur Gesamtaufnahme - volume:93 |
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Enthalten in: |
The Review of scientific instruments - 93(2022), 11 vom: 01. Nov., Seite 113537 |
Sprache: |
Englisch |
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Beteiligte Personen: |
Iwata, A [VerfasserIn] |
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Anmerkungen: |
Date Revised 05.12.2022 published: Print Citation Status PubMed-not-MEDLINE |
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doi: |
10.1063/5.0101885 |
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funding: |
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Förderinstitution / Projekttitel: |
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PPN (Katalog-ID): |
NLM349740933 |
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520 | |a The Paα line (1875.13 nm) in the near-infrared (NIR) region was evaluated to apply Stark broadening of the line spectrum to the electron density measurement of the small-pellet ablation cloud in Heliotron J, a medium-sized helical-axis heliotron device. Paα is three-to-four times broader than the visible Hβ line (486.13 nm) for the same electron density. Using a portable NIR spectrometer, preliminary proof-of-concept experiments determined the marginal density, below which the broadening was undetectable. The lower detection density limit can be decreased using a narrower entrance slit or a denser grating | ||
650 | 4 | |a Journal Article | |
700 | 1 | |a Kado, S |e verfasserin |4 aut | |
700 | 1 | |a Murakumo, M |e verfasserin |4 aut | |
700 | 1 | |a Shikama, T |e verfasserin |4 aut | |
700 | 1 | |a Motojima, G |e verfasserin |4 aut | |
700 | 1 | |a Mori, A |e verfasserin |4 aut | |
700 | 1 | |a Feng, C |e verfasserin |4 aut | |
700 | 1 | |a Okada, H |e verfasserin |4 aut | |
700 | 1 | |a Minami, T |e verfasserin |4 aut | |
700 | 1 | |a Ohshima, S |e verfasserin |4 aut | |
700 | 1 | |a Kobayashi, S |e verfasserin |4 aut | |
700 | 1 | |a Ishizawa, A |e verfasserin |4 aut | |
700 | 1 | |a Nakamura, Y |e verfasserin |4 aut | |
700 | 1 | |a Konoshima, S |e verfasserin |4 aut | |
700 | 1 | |a Mizuuchi, T |e verfasserin |4 aut | |
700 | 1 | |a Nagasaki, K |e verfasserin |4 aut | |
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