Plasma and Fusion Research
Volume 13, 3401053 (2018)
Regular Articles
- Department of Quantum Science and Energy Engineering, Tohoku University, Sendai 980-8579, Japan
- 1)
- Department of Applied Energy, Nagoya University, Nagoya 464-8603, Japan
Abstract
A helium ion beam was injected into hydrogen ionizing plasma using a radio-frequency plasma source to study divertor plasma. Optical emissions from the hydrogen Balmer series and Fulcher-α band were collected. The emissions of the hydrogen Balmer series clearly increased following the onset of the ion beam injection. The behavior of excited hydrogen atoms slightly depend on its excitation energy. In addition to the Balmer series, the emission from hydrogen molecules increased under the existence of energetic ions. These results indicate that the energetic ion collision affects the population density of the excited hydrogen atoms and molecules.
Keywords
divertor, energetic ion, Balmer series, Fulcher-α band, radio-frequency
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