Plasma and Fusion Research
Volume 2, S1126 (2007)
Regular Articles
- Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
- 1)
- Graduate school of Engineering, Hiroshima University, Hiroshima 739-8527, Japan
Abstract
In the central-cell of the GAMMA 10 tandem mirror, a medium-speed camera (CCD camera, 400 frames per second, 216× 640 pixel) has been installed for the observation of plasma behavior. This camera system is designed for monitoring the plasma position and movement in the whole discharge duration. The captured two-dimensional (2-D) images are automatically displayed just after the plasma shot and stored sequentially shot by shot. This system has been established as a helpful tool for optimizing the plasma production and heating systems by measuring the plasma behavior in several experimental conditions. The camera system shows that the intensity of the visible light emission on the central-cell limiter accompanied by central electron cyclotron heating (C-ECH) correlate with the wall conditioning and immersion length of a movable limiter (iris limiter) in the central cell.
Keywords
GAMMA 10, tandem mirror, visible-light emission, two-dimensional image, CCD camera, plasma monitoring system, limiter-plasma interaction
Full Text
References
- [1] R.J. Maqueda and G.A. Wurden et al., Rev. Sci. Instrum. 74(3), 2020 (2003).
- [2] S.J. Zweben et al., Phys. Plasmas 9, 1981 (2002).
- [3] N. Nishino et al., J. Nucl. Mater. 337-339, 1073 (2005).
- [4] Y. Nakashima et al., J.Nucl. Mater. 196-198, 493 (1992).
- [5] Y. Nakashima et al., J.Nucl. Mater. 241-243, 1011 (1997).
- [6] Y. Nakashima et al., J. Plasma Fusion Res. SERIES 5, 428 (2002).
- [7] H. Higaki et al., Rev. Sci. Instrum 75, 4085 (2004).
- [8] Y. Nakashima et al., to be published in J. Nucl. Mater. (2007).
- [9] N. Nishino et al., J. Plasma Fusion Res. 1, 035 (2006).
- [10] H.Higaki et al., to be published in Tans. Fusion Sci. and Technical (2007).
- [11] Y. Nakashima et al., ibid.
This paper may be cited as follows:
Hirokazu KAWANO, Yousuke NAKASHIMA, Yuta HIGASHIZONO, Nobuhiro NISHINO, Takayuki KOBAYASHI, Yoshiyuki MISHIMA, Mirai SUZUKI, Keiji MORI, Yusuke KUBOTA, Masashi YOSHIKAWA and Teruji CHO, Plasma Fusion Res. 2, S1126 (2007).