High-sensitivity measurement of Zeeman effect using hydrogen Paschen-α emission line in fusion-divertor-relevant plasma.

IF 1.3 4区工程技术 Q3 INSTRUMENTS & INSTRUMENTATION

Review of Scientific Instruments Pub Date : 2025-04-01 DOI:10.1063/5.0252647

Minato Murakumo, Taiichi Shikama, Shinichiro Kado, Akihiro Iwata, Tsunehiro Morita, Shinsuke Oshima, Takuto Suzuki, Atsuki Mori, Gen Motojima, Takashi Minami, Shinji Kobayashi, Fumiyoshi Kin, Akihiro Ishizawa, Yuji Nakamura, Shigeru Konoshima, Tohru Mizuuchi, Shigeru Inagaki, Kazunobu Nagasaki, Masahiro Hasuo

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引用次数: 0

Abstract

In magnetically confined fusion reactors, the Zeeman effect can sometimes be utilized in spatially resolved spectroscopy to localize the observed line emission. To apply this method to divertor plasma spectroscopy, the relative magnitude of the Zeeman splitting to linewidth for hydrogen atomic emission lines in the visible to the near-infrared range was evaluated. It was found that the magnitude becomes the largest for the Paschen-α (Paα) emission line (1875 nm, 3-4). The observability of the Zeeman splitting on the Paα emission line spectrum was confirmed by an experiment using a hydrogen pellet ablation plasma in Heliotron J, which is relevant to the divertor plasma in terms of magnetic field strength (1.2 T), electron temperature (∼1 eV), and electron density (3.6 × 1020 m-3).

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来源期刊

Review of Scientific Instruments 工程技术-物理：应用

CiteScore

3.00

自引率

12.50%

发文量

758

审稿时长

2.6 months

期刊介绍： Review of Scientific Instruments, is committed to the publication of advances in scientific instruments, apparatuses, and techniques. RSI seeks to meet the needs of engineers and scientists in physics, chemistry, and the life sciences.