Dependence of plasma parameters in hydrogen discharges on magnetic field configuration and neutral pressure in the DT-ALPHA device

Tomohiro Seino; Hiroyuki Takahashi; Peerapat Boonyarittipong; Takeshi Saikyo; Kenta Ogasawara; Atsushi Okamoto; Sumio Kitajima; Kenji Tobita

doi:10.1585/PFR.15.1201056

Dependence of plasma parameters in hydrogen discharges on magnetic field configuration and neutral pressure in the DT-ALPHA device

Tomohiro Seino, Hiroyuki Takahashi, Peerapat Boonyarittipong, Takeshi Saikyo, Kenta Ogasawara, Atsushi Okamoto, Sumio Kitajima, Kenji Tobita

ENG - Quantum Science and Energy Engineering

Tohoku University

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

Abstract

The dependence of hydrogen plasma parameters on magnetic field configuration and neutral pressure was investigated in the radio-frequency (RF) plasma source DT-ALPHA. It was found that higher electron density was obtained when the lower hybrid resonance condition was satisfied near the RF antenna. It was also found that use of lower hydrogen neutral pressure yielded higher electron density plasma. By optimizing the resonance condition and neutral pressure, the hydrogen plasma of T_e ~ 10 eV and n_e > 1 x 1017 m^-3 was achieved.

Original language	English
Article number	1056
Journal	Plasma and Fusion Research
Volume	15
DOIs	https://doi.org/10.1585/PFR.15.1201056
Publication status	Published - 2020

Keywords

DT-ALPHA
Divertor
Hydrogen plasma
Radio-frequency plasma
Volumetric recombination

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10.1585/PFR.15.1201056

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title = "Dependence of plasma parameters in hydrogen discharges on magnetic field configuration and neutral pressure in the DT-ALPHA device",

abstract = "The dependence of hydrogen plasma parameters on magnetic field configuration and neutral pressure was investigated in the radio-frequency (RF) plasma source DT-ALPHA. It was found that higher electron density was obtained when the lower hybrid resonance condition was satisfied near the RF antenna. It was also found that use of lower hydrogen neutral pressure yielded higher electron density plasma. By optimizing the resonance condition and neutral pressure, the hydrogen plasma of Te ~ 10 eV and ne > 1 x 1017 m-3 was achieved.",

keywords = "DT-ALPHA, Divertor, Hydrogen plasma, Radio-frequency plasma, Volumetric recombination",

author = "Tomohiro Seino and Hiroyuki Takahashi and Peerapat Boonyarittipong and Takeshi Saikyo and Kenta Ogasawara and Atsushi Okamoto and Sumio Kitajima and Kenji Tobita",

note = "Publisher Copyright: {\textcopyright} 2020 The Japan Society of Plasma Science and Nuclear Fusion Research.",

year = "2020",

doi = "10.1585/PFR.15.1201056",

language = "English",

volume = "15",

journal = "Plasma and Fusion Research",

issn = "1880-6821",

publisher = "The Japan Society of Plasma Science and Nuclear Fusion Research (JSPF)",

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T1 - Dependence of plasma parameters in hydrogen discharges on magnetic field configuration and neutral pressure in the DT-ALPHA device

AU - Seino, Tomohiro

AU - Takahashi, Hiroyuki

AU - Boonyarittipong, Peerapat

AU - Saikyo, Takeshi

AU - Ogasawara, Kenta

AU - Okamoto, Atsushi

AU - Kitajima, Sumio

AU - Tobita, Kenji

PY - 2020

Y1 - 2020

N2 - The dependence of hydrogen plasma parameters on magnetic field configuration and neutral pressure was investigated in the radio-frequency (RF) plasma source DT-ALPHA. It was found that higher electron density was obtained when the lower hybrid resonance condition was satisfied near the RF antenna. It was also found that use of lower hydrogen neutral pressure yielded higher electron density plasma. By optimizing the resonance condition and neutral pressure, the hydrogen plasma of Te ~ 10 eV and ne > 1 x 1017 m-3 was achieved.

AB - The dependence of hydrogen plasma parameters on magnetic field configuration and neutral pressure was investigated in the radio-frequency (RF) plasma source DT-ALPHA. It was found that higher electron density was obtained when the lower hybrid resonance condition was satisfied near the RF antenna. It was also found that use of lower hydrogen neutral pressure yielded higher electron density plasma. By optimizing the resonance condition and neutral pressure, the hydrogen plasma of Te ~ 10 eV and ne > 1 x 1017 m-3 was achieved.

KW - DT-ALPHA

KW - Divertor

KW - Hydrogen plasma

KW - Radio-frequency plasma

KW - Volumetric recombination

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U2 - 10.1585/PFR.15.1201056

DO - 10.1585/PFR.15.1201056

M3 - Article

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VL - 15

JO - Plasma and Fusion Research

JF - Plasma and Fusion Research

M1 - 1056

ER -

Dependence of plasma parameters in hydrogen discharges on magnetic field configuration and neutral pressure in the DT-ALPHA device

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