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 language | English |
|---|---|
| Pages (from-to) | 268-270 |
| Number of pages | 3 |
| Journal | Fusion Science and Technology |
| Volume | 51 |
| Issue number | 2 T. |
| Publication status | Published - Feb 1 2007 |
| Externally published | Yes |
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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
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 journal › Article
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TY - JOUR
T1 - Ion temperature measurements in Tohoku university Heliac for analysis of the improved mode transition
AU - Ogawa, M.
AU - Ogawa, H.
AU - Takahashi, H.
AU - Tanaka, Y.
AU - Utoh, H.
AU - Shinde, J.
AU - Iwazaki, K.
AU - Aoyama, H.
AU - Umetsu, H.
AU - Okamoto, A.
AU - Shinto, K.
AU - Kitajima, S.
AU - Yokoyama, M.
AU - Inagaki, S.
AU - Suzuki, Y.
AU - Nishimura, K.
AU - Sasao, M.
PY - 2007/2/1
Y1 - 2007/2/1
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=34247528149&partnerID=8YFLogxK
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M3 - Article
AN - SCOPUS:34247528149
VL - 51
SP - 268
EP - 270
JO - Fusion Science and Technology
JF - Fusion Science and Technology
SN - 1536-1055
IS - 2 T.
ER -