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- Title
Plasma Spectroscopy on an Aluminum-Pellet Ablation Cloud in an LHD Plasma with an Echelle Spectrometer.
- Authors
Tanaka, Hirotaka; Fujii, Keisuke; Shikama, Taiichi; Morita, Shigeru; Goto, Motoshi; Hasuo, Masahiro
- Abstract
We developed an echelle spectrometer for the simultaneous observation of the whole visible range with a high instrumental resolution, for example, 0.055 nm (full width at the half maximum) at 400 nm and 0.10 nm at 750 nm. With the spectrometer, the emission from an ablation cloud of an aluminum pellet injected into a high-temperature plasma generated in the Large Helical Device (LHD) was measured. We separated the emission lines into Al I, II, III and IV groups, and estimated the electron temperature and density of the ablation cloud from the line intensity distribution and Stark broadening respectively, of each of the Al I, II and III groups. We also determined the Stark broadening coefficients of many Al II and III lines from the respective Stark widths with the estimated electron temperature and density.
- Subjects
PLASMA spectroscopy; SPECTROMETERS; LASER ablation inductively coupled plasma mass spectrometry; ELECTRON density; ELECTRON temperature; SPECTRAL line broadening
- Publication
Atoms (2218-2004), 2020, Vol 8, Issue 4, p81
- ISSN
2218-2004
- Publication type
Article
- DOI
10.3390/atoms8040081