Spatially resolved measurements of metastable atom density and electric field strength in a microhollow cathode helium plasma by laser absorption spectroscopy

Keisuke Ueno; Kenta Kamebuchi; Jiro Kakutani; Leo Matsuoka; Shinichi Namba; Keisuke Fujii; Taiichi Shikama; Masahiro Hasuo

doi:10.1585/PFR.13.3406070

Spatially resolved measurements of metastable atom density and electric field strength in a microhollow cathode helium plasma by laser absorption spectroscopy

Keisuke Ueno, Kenta Kamebuchi, Jiro Kakutani, Leo Matsuoka, Shinichi Namba, Keisuke Fujii, Taiichi Shikama, Masahiro Hasuo

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

2 Scopus citations

Abstract

We apply laser absorption spectroscopy to direct-current hollow-cathode helium plasma generated in a 0.3- mm-diameter cylindrical hole at gas pressures of 10 - 80 kPa. The measured transitions are 2³S-2³P and 2¹P-3¹D. We evaluate the helium metastable 2³S density and gas temperature using the former transition and the 2¹P atom density and electric field strength from the latter one. The observed lateral distributions of the 2³S and 2¹P atom densities depend on the gas pressure, which results from the sheath length estimated based on the spatial distribution of the evaluated electric field strength.

Original language	English
Article number	3406070
Journal	Plasma and Fusion Research
Volume	13
DOIs	https://doi.org/10.1585/PFR.13.3406070
State	Published - 2018
Externally published	Yes

Funding

This work was partly supported by JSPS KAK-ENHI Grant-in-Aid for Challenging Exploratory Research (No.15K13607) and the Kansai Research Foundation for technology promotion (No. 2015R035).

Funders	Funder number
Kansai Research Foundation for technology promotion	2015R035
Japan Society for the Promotion of Science	18K03576, 15K13607

Keywords

Helium metastable
Laser absorption spectroscopy
Microhollow cathode discharges

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title = "Spatially resolved measurements of metastable atom density and electric field strength in a microhollow cathode helium plasma by laser absorption spectroscopy",

abstract = "We apply laser absorption spectroscopy to direct-current hollow-cathode helium plasma generated in a 0.3- mm-diameter cylindrical hole at gas pressures of 10 - 80 kPa. The measured transitions are 23S-23P and 21P-31D. We evaluate the helium metastable 23S density and gas temperature using the former transition and the 21P atom density and electric field strength from the latter one. The observed lateral distributions of the 23S and 21P atom densities depend on the gas pressure, which results from the sheath length estimated based on the spatial distribution of the evaluated electric field strength.",

keywords = "Helium metastable, Laser absorption spectroscopy, Microhollow cathode discharges",

author = "Keisuke Ueno and Kenta Kamebuchi and Jiro Kakutani and Leo Matsuoka and Shinichi Namba and Keisuke Fujii and Taiichi Shikama and Masahiro Hasuo",

note = "Publisher Copyright: {\textcopyright} 2019 The Japan Society of Plasma Science and Nuclear Fusion Research.",

year = "2018",

doi = "10.1585/PFR.13.3406070",

language = "English",

volume = "13",

journal = "Plasma and Fusion Research",

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TY - JOUR

T1 - Spatially resolved measurements of metastable atom density and electric field strength in a microhollow cathode helium plasma by laser absorption spectroscopy

AU - Ueno, Keisuke

AU - Kamebuchi, Kenta

AU - Kakutani, Jiro

AU - Matsuoka, Leo

AU - Namba, Shinichi

AU - Fujii, Keisuke

AU - Shikama, Taiichi

AU - Hasuo, Masahiro

PY - 2018

Y1 - 2018

N2 - We apply laser absorption spectroscopy to direct-current hollow-cathode helium plasma generated in a 0.3- mm-diameter cylindrical hole at gas pressures of 10 - 80 kPa. The measured transitions are 23S-23P and 21P-31D. We evaluate the helium metastable 23S density and gas temperature using the former transition and the 21P atom density and electric field strength from the latter one. The observed lateral distributions of the 23S and 21P atom densities depend on the gas pressure, which results from the sheath length estimated based on the spatial distribution of the evaluated electric field strength.

AB - We apply laser absorption spectroscopy to direct-current hollow-cathode helium plasma generated in a 0.3- mm-diameter cylindrical hole at gas pressures of 10 - 80 kPa. The measured transitions are 23S-23P and 21P-31D. We evaluate the helium metastable 23S density and gas temperature using the former transition and the 21P atom density and electric field strength from the latter one. The observed lateral distributions of the 23S and 21P atom densities depend on the gas pressure, which results from the sheath length estimated based on the spatial distribution of the evaluated electric field strength.

KW - Helium metastable

KW - Laser absorption spectroscopy

KW - Microhollow cathode discharges

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U2 - 10.1585/PFR.13.3406070

DO - 10.1585/PFR.13.3406070

M3 - Article

AN - SCOPUS:85062274459

SN - 1880-6821

VL - 13

JO - Plasma and Fusion Research

JF - Plasma and Fusion Research

M1 - 3406070

ER -

Spatially resolved measurements of metastable atom density and electric field strength in a microhollow cathode helium plasma by laser absorption spectroscopy

Abstract

Funding

Keywords

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