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Evaluation of Excitation Conditions of ITG Modes in the PANTA

Yudai MIWA, Naohiro KASUYA^1,2), Makoto SASAKI^1,2), Shigeru INAGAKI^1,2), Kimitaka ITOH^2,3), Masatoshi YAGI^2,4), Akihide FUJISAWA^1,2), Yoshihiko NAGASHIMA^1,2), Maxime LESUR^1,2), Tatsuya KOBAYASHI, Soutarou YAMADA, Tetsuo YAMASHITA, Satoshi OTSUBO, Shinsuke KAKIGAWA, Tomohiro MITSUZONO, Hirofumi FUJINO and Sanae-I. ITOH^1,2)

Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, Kasuga, Fukuoka 816-8580, Japan

1)

Research Institute for Applied Mechanics, Kyushu University, Kasuga, Fukuoka 816-8580, Japan

2)

Itoh Research Center for Plasma Turbulence, Kyushu University, Kasuga, Fukuoka 816-8580, Japan

3)

National Institute for Fusion Science, Toki, Gifu 509-5292, Japan

4)

Japan Atomic Energy Agency, Rokkasho, Aomori 039-3212, Japan

(Received 7 December 2012 / Accepted 10 May 2013 / Published 26 September 2013)

Abstract

To study the nonlinear saturation mechanism in turbulent plasmas, we plan to obseve ion temperature gradient (ITG) modes in the Plasma Assembly for Nonlinear Turbulence Analysis (PANTA). Linear growth rates of ITG modes in the linear device are analyzed to determine their excitation conditions using a three-field fluid model to describe the ion motion. Parameter scans of the linear growth rate show the threshold for ITG mode excitation, and the typical plasma parameters of the PANTA are found in the unstable domain.

Copyright (c) 2013 The Japan Society of Plasma Science and Nuclear Fusion Research

Keywords

ion temperature gradient mode, linear growth rate, linear device, threshold value, collision, local approximation, dispersion relation

DOI: 10.1585/pfr.8.2403133

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This paper may be cited as follows:

Yudai MIWA, Naohiro KASUYA, Makoto SASAKI, Shigeru INAGAKI, Kimitaka ITOH, Masatoshi YAGI, Akihide FUJISAWA, Yoshihiko NAGASHIMA, Maxime LESUR, Tatsuya KOBAYASHI, Soutarou YAMADA, Tetsuo YAMASHITA, Satoshi OTSUBO, Shinsuke KAKIGAWA, Tomohiro MITSUZONO, Hirofumi FUJINO and Sanae-I. ITOH, Plasma Fusion Res. 8, 2403133 (2013).