Measurements of atomic hydrogen-density profiles in the rfc-xx-m machine using laser fluorescence spectroscopy at the hαtransition

Katsunori Muraoka, Kiichiro Uchino, Yoshio Itsumi, Makoto Hamamoto, Mitsuo Maeda, Masanori Akazaki, Toshikazu Kawamoto, Ryuhei Kumazawa, Shoichi Okamura, Keizō Adati, Takashi Aoki, Hideki Fujita, Kazutoshi Hattori, Shigeru Hidekuma, Yoshimi Okubo, Teruyuki Sato, Harold R. Garner, Dan R. Baker, Harry D. Price

Research output: Contribution to journalArticle

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Abstract

To assist in the study of the power balance in a linear confinement machine, atomic hydrogen-density profiles in plasmas of the RFC-XX-M device were measured using laser fluorescence spectroscopy tuned to the Balmer alpha line. Measured profiles showed marked decreases of neutral densities in the centre of the plasma, which are explained by charge-exchange and electron ionization pumping by the plasma. It is important to note that the neutrals are well burned out in the central cell, N1/Ne≲ 0. 01. Further, charge-exchange losses are quantitatively evaluated and discussed from the neutral-density profiles and parameters of the plasma.

Original languageEnglish
Pages (from-to)59-61
Number of pages3
JournalJapanese Journal of Applied Physics
Volume24
Issue number1
DOIs
Publication statusPublished - Jan 1 1985

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Laser spectroscopy
Fluorescence spectroscopy
Plasmas
fluorescence
Hydrogen
hydrogen
profiles
charge exchange
spectroscopy
lasers
Plasma confinement
ionization
Ionization
Ion exchange
pumping
Electrons
cells

All Science Journal Classification (ASJC) codes

  • Engineering(all)
  • Physics and Astronomy(all)

Cite this

Measurements of atomic hydrogen-density profiles in the rfc-xx-m machine using laser fluorescence spectroscopy at the hαtransition. / Muraoka, Katsunori; Uchino, Kiichiro; Itsumi, Yoshio; Hamamoto, Makoto; Maeda, Mitsuo; Akazaki, Masanori; Kawamoto, Toshikazu; Kumazawa, Ryuhei; Okamura, Shoichi; Adati, Keizō; Aoki, Takashi; Fujita, Hideki; Hattori, Kazutoshi; Hidekuma, Shigeru; Okubo, Yoshimi; Sato, Teruyuki; Garner, Harold R.; Baker, Dan R.; Price, Harry D.

In: Japanese Journal of Applied Physics, Vol. 24, No. 1, 01.01.1985, p. 59-61.

Research output: Contribution to journalArticle

Muraoka, K, Uchino, K, Itsumi, Y, Hamamoto, M, Maeda, M, Akazaki, M, Kawamoto, T, Kumazawa, R, Okamura, S, Adati, K, Aoki, T, Fujita, H, Hattori, K, Hidekuma, S, Okubo, Y, Sato, T, Garner, HR, Baker, DR & Price, HD 1985, 'Measurements of atomic hydrogen-density profiles in the rfc-xx-m machine using laser fluorescence spectroscopy at the hαtransition', Japanese Journal of Applied Physics, vol. 24, no. 1, pp. 59-61. https://doi.org/10.1143/JJAP.24.L59
Muraoka, Katsunori ; Uchino, Kiichiro ; Itsumi, Yoshio ; Hamamoto, Makoto ; Maeda, Mitsuo ; Akazaki, Masanori ; Kawamoto, Toshikazu ; Kumazawa, Ryuhei ; Okamura, Shoichi ; Adati, Keizō ; Aoki, Takashi ; Fujita, Hideki ; Hattori, Kazutoshi ; Hidekuma, Shigeru ; Okubo, Yoshimi ; Sato, Teruyuki ; Garner, Harold R. ; Baker, Dan R. ; Price, Harry D. / Measurements of atomic hydrogen-density profiles in the rfc-xx-m machine using laser fluorescence spectroscopy at the hαtransition. In: Japanese Journal of Applied Physics. 1985 ; Vol. 24, No. 1. pp. 59-61.
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AU - Hamamoto, Makoto

AU - Maeda, Mitsuo

AU - Akazaki, Masanori

AU - Kawamoto, Toshikazu

AU - Kumazawa, Ryuhei

AU - Okamura, Shoichi

AU - Adati, Keizō

AU - Aoki, Takashi

AU - Fujita, Hideki

AU - Hattori, Kazutoshi

AU - Hidekuma, Shigeru

AU - Okubo, Yoshimi

AU - Sato, Teruyuki

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AU - Baker, Dan R.

AU - Price, Harry D.

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