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

Erscheinungsjahr:

2022

Erschienen:

2022

Enthalten in:

Zur Gesamtaufnahme - volume:93

Enthalten in:

The Review of scientific instruments - 93(2022), 11 vom: 01. Nov., Seite 113537

Sprache:

Englisch

Beteiligte Personen:

Iwata, A [VerfasserIn]
Kado, S [VerfasserIn]
Murakumo, M [VerfasserIn]
Shikama, T [VerfasserIn]
Motojima, G [VerfasserIn]
Mori, A [VerfasserIn]
Feng, C [VerfasserIn]
Okada, H [VerfasserIn]
Minami, T [VerfasserIn]
Ohshima, S [VerfasserIn]
Kobayashi, S [VerfasserIn]
Ishizawa, A [VerfasserIn]
Nakamura, Y [VerfasserIn]
Konoshima, S [VerfasserIn]
Mizuuchi, T [VerfasserIn]
Nagasaki, K [VerfasserIn]

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Anmerkungen:

Date Revised 05.12.2022

published: Print

Citation Status PubMed-not-MEDLINE

doi:

10.1063/5.0101885

funding:

Förderinstitution / Projekttitel:

PPN (Katalog-ID):

NLM349740933