TY - JOUR
T1 - Analysis of ion-temperature-gradient instabilities using a gyro-fluid model in cylindrical plasmas
AU - Hattori, Genryu
AU - Kasuya, Naohiro
AU - Yagi, Masatoshi
N1 - Funding Information:
Authors acknowledge discussions with Prof. S. Inagaki, Dr. M. Sasaki, Dr. Y. Kosuga, and Mr. Y. Miwa. This work is supported by the Grant-in-Aid for Young Scientists (24760703), for Scientific Research (23244113) of JSPS, by the collaboration program of NIFS (NIFS13KNST050, NIFS13KOCT001) and of RIAM of Kyushu University.
Publisher Copyright:
© 2015 The Japan Society of Plasma Science and Nuclear Fusion Research.
PY - 2015
Y1 - 2015
N2 - The excitation condition for ion-temperature-gradient (ITG) instabilities in linear devices is investigated using a gyro-fluid equation. The finite-Larmor-radius effect is included in the model, which helps to stabilize ITG instabilities. The critical values of ?, which is the ratio of the lengths of the density gradient to the temperature gradient, are obtained. Although the modenumbers of the most unstable modes are different with different discharge gases, their critical values have almost the same η level close to 1.0. The results are compared with those from the Hamaguchi-Horton model numerically and analytically.
AB - The excitation condition for ion-temperature-gradient (ITG) instabilities in linear devices is investigated using a gyro-fluid equation. The finite-Larmor-radius effect is included in the model, which helps to stabilize ITG instabilities. The critical values of ?, which is the ratio of the lengths of the density gradient to the temperature gradient, are obtained. Although the modenumbers of the most unstable modes are different with different discharge gases, their critical values have almost the same η level close to 1.0. The results are compared with those from the Hamaguchi-Horton model numerically and analytically.
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U2 - 10.1585/pfr.10.3401060
DO - 10.1585/pfr.10.3401060
M3 - Article
AN - SCOPUS:85034647972
SN - 1880-6821
VL - 10
JO - Plasma and Fusion Research
JF - Plasma and Fusion Research
M1 - 3401060
ER -