Plasma and Fusion Research
Volume 10, 3401060 (2015)
Regular Articles
- Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, 6-1 Kasuga-Koen, Kasuga, Fukuoka 816-8580, Japan
- 1)
- Research Institute for Applied Mechanics, Kyushu University, 6-1 Kasuga-Koen, Kasuga, Fukuoka 816-8580, Japan
- 2)
- Japan Atomic Energy Agency, 2-166 Omotedate, Obuchi, Rokkasho-mura, Aomori 039-3212, Japan
Abstract
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 η, 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.
Keywords
ion-temperature-gradient instability, finite-Larmor-radius effect, gyro-fluid equation, linear device
Full Text
References
- [1] P.H. Diamond et al., Plasma Phys. Control. Fusion 47, R35 (2005).
- [2] W. Horton, Rev. Mod. Phys. 71, 735 (1999).
- [3] B. Coppi et al., Phys. Fluids 10, 582 (1967).
- [4] G.W. Hammett and F.W. Perkins, Phys. Rev. Lett. 64, 3019 (1990).
- [5] G.S. Lee and P.H. Diamond, Phys. Fluids 29, 3291 (1986).
- [6] A.K. Sen et al., Phys. Rev. Lett. 66, 429 (1991).
- [7] S. Oldenbürger et al., Plasma Phys. Control. Fusion 54, 055002 (2012).
- [8] S. Inagaki et al., Plasma Fusion Res. 9, 1201216 (2014).
- [9] Y. Miwa et al., Plasma Fusion Res. 8, 2403133 (2013).
- [10] W. Dorland and G.W. Hammett, Phys. Fluids B 5, 812 (1993).
- [11] P. Snyder, Ph. D. thesis, Princeton Univ. (1999).
- [12] S. Hamaguchi and W. Horton, Phys. Fluids B 2, 1833 (1990).
- [13] R. Balescu, Aspect of Anomalous Transport in Plasmas (CRC Press, 2005).
This paper may be cited as follows:
Genryu HATTORI, Naohiro KASUYA and Masatoshi YAGI, Plasma Fusion Res. 10, 3401060 (2015).