Plasma and Fusion Research

Volume 7, 2402136 (2012)

Regular Articles

Improvement of ICRF Antenna Loading in the Minimum-B Configuration on GAMMA 10

Takuro YOKOYAMA, Makoto ICHIMURA, Ryuya IKEZOE, Yumeto UGAJIN, Toru IWAI, Tatsunori SATO, Takuma IIMURA, Yu-ki SAITO, Mafumi HIRATA, Yuusuke YAMAGUCHI¹⁾, Atsushi FUKUYAMA²⁾ and Tsuyoshi IMAI

: Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
1): Research Center for Development of Far-Infrared Region, University of Fukui, Fukui 910-8507, Japan
2): Department of Nuclear Engineering, Graduate School of Engineering, Kyoto University, Kyoto 606-8501, Japan

(Received 9 December 2011 / Accepted 13 July 2012 / Published 15 October 2012)

Abstract

On GAMMA10, waves in Ion-Cyclotron Range of Frequency (ICRF) are used to produce initial plasmas, heat plasmas and keep magneto-hydrodynamic (MHD) stability. High performance plasmas in the minimum-B configuration supply MHD stability. In order to enhance plasma heating, we introduce an ICRF system for heating plasmas in the anchor cell and evaluate its antenna loading. Changing the antenna shape is expected to improve antenna loading. In the experiment, we confirm to increase the antenna loading by changing the antenna shape from simple bar-type to the double elliptic arc type.

Keywords

GAMMA10, ICRF heating, minimum-B field, ICRF antenna, wave transmission

DOI: 10.1585/pfr.7.2402136

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References

[1] M. Inutake et al., Phys. Rev. Lett. 31, 3397 (1990).
[2] M. Ichimura et al., Phys. Plasmas 8, 2066 (2001).
[3] Y. Yamaguchi et al., Fusion Sci. Technol. 59, No.1T, 250 (2011)

This paper may be cited as follows:

Takuro YOKOYAMA, Makoto ICHIMURA, Ryuya IKEZOE, Yumeto UGAJIN, Toru IWAI, Tatsunori SATO, Takuma IIMURA, Yu-ki SAITO, Mafumi HIRATA, Yuusuke YAMAGUCHI, Atsushi FUKUYAMA and Tsuyoshi IMAI, Plasma Fusion Res. 7, 2402136 (2012).