Plasma spectroscopy on an aluminum-pellet ablation cloud in an lhd plasma with an echelle spectrometer

Hirotaka Tanaka; Keisuke Fujii; Taiichi Shikama; Shigeru Morita; Motoshi Goto; Masahiro Hasuo

doi:10.3390/atoms8040081

Plasma spectroscopy on an aluminum-pellet ablation cloud in an lhd plasma with an echelle spectrometer

Hirotaka Tanaka, Keisuke Fujii, Taiichi Shikama, Shigeru Morita, Motoshi Goto, Masahiro Hasuo

Research output: Contribution to journal › Article › peer-review

3 Scopus citations

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.

Original language	English
Article number	81
Pages (from-to)	1-15
Number of pages	15
Journal	Atoms
Volume	8
Issue number	4
DOIs	https://doi.org/10.3390/atoms8040081
State	Published - Dec 2020
Externally published	Yes

Funding

Funding: This work has been financially supported by the NIFS Collaborative Research Program NIFS12KLPH017 and by the Grant-in-Aid for Scientific Research, No. 20K20962, from the Japan Society for the Promotion of Science.

Funders	Funder number
Japan Society for the Promotion of Science

Keywords

Aluminum atoms and ions
Echelle spectrometer
LHD
Pellet ablation plasma
Plasma spectroscopy
Stark broadening

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10.3390/atoms8040081

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title = "Plasma spectroscopy on an aluminum-pellet ablation cloud in an lhd plasma with an echelle spectrometer",

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.",

keywords = "Aluminum atoms and ions, Echelle spectrometer, LHD, Pellet ablation plasma, Plasma spectroscopy, Stark broadening",

author = "Hirotaka Tanaka and Keisuke Fujii and Taiichi Shikama and Shigeru Morita and Motoshi Goto and Masahiro Hasuo",

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T1 - Plasma spectroscopy on an aluminum-pellet ablation cloud in an lhd plasma with an echelle spectrometer

AU - Tanaka, Hirotaka

AU - Fujii, Keisuke

AU - Shikama, Taiichi

AU - Morita, Shigeru

AU - Goto, Motoshi

AU - Hasuo, Masahiro

PY - 2020/12

Y1 - 2020/12

N2 - 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.

AB - 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.

KW - Aluminum atoms and ions

KW - Echelle spectrometer

KW - LHD

KW - Pellet ablation plasma

KW - Plasma spectroscopy

KW - Stark broadening

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DO - 10.3390/atoms8040081

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JO - Atoms

JF - Atoms

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ER -

Plasma spectroscopy on an aluminum-pellet ablation cloud in an lhd plasma with an echelle spectrometer

Abstract

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Keywords

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