Ion temperature measurements in Tohoku university Heliac for analysis of the improved mode transition

M. Ogawa, H. Ogawa, H. Takahashi, Y. Tanaka, H. Utoh, J. Shinde, K. Iwazaki, H. Aoyama, H. Umetsu, A. Okamoto, K. Shinto, S. Kitajima, M. Yokoyama, S. Inagaki, Y. Suzuki, K. Nishimura, M. Sasao

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

In the Tohoku University Heliac, transition to the improved mode has been observed when the plasma in biased with a hot cathode inserted into the plasma. Ion temperature measurement using high-resolution spectroscopy demonstrated that when the plasma was biased and transited to the improved mode, the ion temperature increased or was kept almost constant, and the ion density also increased. The total stored energy (the products of temperature and density, neTa, niTi) increased in the improved mode. In neoclassical theory, nonlinearity in ion viscosity plays a key role in the transition. The ion viscosity estimated from the measured ion temperature was consistent with the predictions of the neoclassical theory.

Original languageEnglish
Pages (from-to)268-270
Number of pages3
JournalFusion Science and Technology
Volume51
Issue number2 T.
Publication statusPublished - Feb 1 2007
Externally publishedYes

Fingerprint

ion temperature
Temperature measurement
temperature measurement
Ions
viscosity
hot cathodes
Plasmas
ions
nonlinearity
Viscosity
high resolution
products
predictions
Temperature
spectroscopy
Cathodes
Spectroscopy
temperature
energy

All Science Journal Classification (ASJC) codes

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

Cite this

Ogawa, M., Ogawa, H., Takahashi, H., Tanaka, Y., Utoh, H., Shinde, J., ... Sasao, M. (2007). Ion temperature measurements in Tohoku university Heliac for analysis of the improved mode transition. Fusion Science and Technology, 51(2 T.), 268-270.

Ion temperature measurements in Tohoku university Heliac for analysis of the improved mode transition. / Ogawa, M.; Ogawa, H.; Takahashi, H.; Tanaka, Y.; Utoh, H.; Shinde, J.; Iwazaki, K.; Aoyama, H.; Umetsu, H.; Okamoto, A.; Shinto, K.; Kitajima, S.; Yokoyama, M.; Inagaki, S.; Suzuki, Y.; Nishimura, K.; Sasao, M.

In: Fusion Science and Technology, Vol. 51, No. 2 T., 01.02.2007, p. 268-270.

Research output: Contribution to journalArticle

Ogawa, M, Ogawa, H, Takahashi, H, Tanaka, Y, Utoh, H, Shinde, J, Iwazaki, K, Aoyama, H, Umetsu, H, Okamoto, A, Shinto, K, Kitajima, S, Yokoyama, M, Inagaki, S, Suzuki, Y, Nishimura, K & Sasao, M 2007, 'Ion temperature measurements in Tohoku university Heliac for analysis of the improved mode transition', Fusion Science and Technology, vol. 51, no. 2 T., pp. 268-270.
Ogawa M, Ogawa H, Takahashi H, Tanaka Y, Utoh H, Shinde J et al. Ion temperature measurements in Tohoku university Heliac for analysis of the improved mode transition. Fusion Science and Technology. 2007 Feb 1;51(2 T.):268-270.
Ogawa, M. ; Ogawa, H. ; Takahashi, H. ; Tanaka, Y. ; Utoh, H. ; Shinde, J. ; Iwazaki, K. ; Aoyama, H. ; Umetsu, H. ; Okamoto, A. ; Shinto, K. ; Kitajima, S. ; Yokoyama, M. ; Inagaki, S. ; Suzuki, Y. ; Nishimura, K. ; Sasao, M. / Ion temperature measurements in Tohoku university Heliac for analysis of the improved mode transition. In: Fusion Science and Technology. 2007 ; Vol. 51, No. 2 T. pp. 268-270.
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