Real time boronization experiments in CHS and scaling for LHD

A. Sagara, Y. Hasegawa, K. Tsuzuki, N. Inoue, H. Suzuki, T. Morisaki, N. Noda, O. Motojima, S. Okamura, K. Matsuoka, R. Akiyama, K. Ida, Hiroshi Idei, K. Iwasaki, S. Kubo, T. Minami, S. Morita, K. Narihara, T. Ozaki, K. SatoC. Takahashi, K. Tanaka, K. Toi, I. Yamada

Research output: Contribution to journalArticle

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Abstract

As a promising wall-conditioning technique in LHD under steady-state high magnetic fields with superconducting magnets, real time boronization (RTB) by puffing decaborane B10H14 into the main NBI-heated plasma has been first examined in CHS. It is shown that, as compared with the usual glow discharge method, only the 2 orders smaller amount of decaborane is efficient to reduce plasma impurities such as oxygen and metals, resulting in expansion of the operating region of the plasma density and stored energy. The puffing at the inside of the LCFS gives better results on RTB than the outer. Even after RTB on the wall at the room temperature, hydrogen recycling does not increase probably due to the small consumed amount with a high plasma heating power used. The operative RTB parameters expected in LHD are estimated using the first scaling of boronization on the device size.

Original languageEnglish
Pages (from-to)972-976
Number of pages5
JournalJournal of Nuclear Materials
Volume241-243
Publication statusPublished - Feb 11 1997
Externally publishedYes

Fingerprint

Plasma heating
Plasmas
scaling
Superconducting magnets
Plasma density
Glow discharges
Recycling
Hydrogen
Metals
Experiments
Impurities
Magnetic fields
Oxygen
plasma heating
superconducting magnets
conditioning
recycling
glow discharges
plasma density
impurities

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Nuclear Energy and Engineering
  • Materials Science(all)

Cite this

Sagara, A., Hasegawa, Y., Tsuzuki, K., Inoue, N., Suzuki, H., Morisaki, T., ... Yamada, I. (1997). Real time boronization experiments in CHS and scaling for LHD. Journal of Nuclear Materials, 241-243, 972-976.

Real time boronization experiments in CHS and scaling for LHD. / Sagara, A.; Hasegawa, Y.; Tsuzuki, K.; Inoue, N.; Suzuki, H.; Morisaki, T.; Noda, N.; Motojima, O.; Okamura, S.; Matsuoka, K.; Akiyama, R.; Ida, K.; Idei, Hiroshi; Iwasaki, K.; Kubo, S.; Minami, T.; Morita, S.; Narihara, K.; Ozaki, T.; Sato, K.; Takahashi, C.; Tanaka, K.; Toi, K.; Yamada, I.

In: Journal of Nuclear Materials, Vol. 241-243, 11.02.1997, p. 972-976.

Research output: Contribution to journalArticle

Sagara, A, Hasegawa, Y, Tsuzuki, K, Inoue, N, Suzuki, H, Morisaki, T, Noda, N, Motojima, O, Okamura, S, Matsuoka, K, Akiyama, R, Ida, K, Idei, H, Iwasaki, K, Kubo, S, Minami, T, Morita, S, Narihara, K, Ozaki, T, Sato, K, Takahashi, C, Tanaka, K, Toi, K & Yamada, I 1997, 'Real time boronization experiments in CHS and scaling for LHD', Journal of Nuclear Materials, vol. 241-243, pp. 972-976.
Sagara A, Hasegawa Y, Tsuzuki K, Inoue N, Suzuki H, Morisaki T et al. Real time boronization experiments in CHS and scaling for LHD. Journal of Nuclear Materials. 1997 Feb 11;241-243:972-976.
Sagara, A. ; Hasegawa, Y. ; Tsuzuki, K. ; Inoue, N. ; Suzuki, H. ; Morisaki, T. ; Noda, N. ; Motojima, O. ; Okamura, S. ; Matsuoka, K. ; Akiyama, R. ; Ida, K. ; Idei, Hiroshi ; Iwasaki, K. ; Kubo, S. ; Minami, T. ; Morita, S. ; Narihara, K. ; Ozaki, T. ; Sato, K. ; Takahashi, C. ; Tanaka, K. ; Toi, K. ; Yamada, I. / Real time boronization experiments in CHS and scaling for LHD. In: Journal of Nuclear Materials. 1997 ; Vol. 241-243. pp. 972-976.
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AU - Sagara, A.

AU - Hasegawa, Y.

AU - Tsuzuki, K.

AU - Inoue, N.

AU - Suzuki, H.

AU - Morisaki, T.

AU - Noda, N.

AU - Motojima, O.

AU - Okamura, S.

AU - Matsuoka, K.

AU - Akiyama, R.

AU - Ida, K.

AU - Idei, Hiroshi

AU - Iwasaki, K.

AU - Kubo, S.

AU - Minami, T.

AU - Morita, S.

AU - Narihara, K.

AU - Ozaki, T.

AU - Sato, K.

AU - Takahashi, C.

AU - Tanaka, K.

AU - Toi, K.

AU - Yamada, I.

PY - 1997/2/11

Y1 - 1997/2/11

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