Plasma and Fusion Research

Volume 3, 053 (2008)

Regular Articles

Microwave Imaging Reflectometry Experiment in TPE-RX

Yoshio NAGAYAMA, Soichiro YAMAGUCHI¹⁾, Zhongbing SHI²⁾, Yuichiro KOGI³⁾, Atsushi MASE³⁾, Shoji SUGITO, Yoichi HIRANO⁴⁾, Satoru KIYAMA⁴⁾, Haruhisa KOGUCHI⁴⁾, Hajime SAKAKITA⁴⁾, Kiyoyuki YAMBE⁴⁾ and Nobuyoshi OHYABU

National Institute for Fusion Science, Toki 509-5292, Japan
1): Kansai University, Suita 564-8680, Japan
2): The Graduate University for Advanced Studies, Toki 509-5292, Japan
3): KASTEC, Kyushu University, Kasuga 816-8580, Japan
4): National Institute of Advanced Industrial Science and Technology, Tsukuba 305-8568, Japan

(Received 21 May 2008 / Accepted 22 July 2008 / Published 27 October 2008)

Abstract

Microwave imaging reflectometry (MIR) was developed in TPE-RX, one of the world's largest reversed field pinch (RFP) devices. The system optics are made of aluminum mirrors, Teflon lenses, and Plexiglas plates in order to reduce size. In this system, frequencies are stabilized so that noise can be reduced using narrow bandpass filters. A 4×4 2-D mixer array and phase detection system have also been developed. With this system, density fluctuations in the high-Θ RFP plasma, pulsed poloidal current drive (PPCD) plasma, and quasi-single helicity (QSH) plasma are observed in TPE-RX. This is the first MIR experiment in an RFP device.

Keywords

MIR (microwave imaging reflectometry), density fluctuation, RFP (reversed field pinch), TPE-RX

DOI: 10.1585/pfr.3.053

Full Text

PDF format (1.1Mbytes) PDF Download

References

[1] E. Mazzucato, Rev. Sci. Instrum. 69, 2201 (1998).
[2] H. Park et al., Rev. Sci. Instrum. 74, 4239 (2003).
[3] Y. Yagi et al., Nucl. Fusion 45, 138 (2005).
[4] S. Yamaguchi et al., Rev. Sci. Instrum. 77, 10E930 (2006).
[5] S. Yamaguchi et al., Plasma Fusion Res. 2, S1038 (2007).
[6] H. Hojo, Y. Kurosawa and A. Mase, Rev. Sci. Instrum. 70, 983 (1999).
[7] H. Hojo, T. Uruta, A. Fukuchi and A. Mase, Rev. Sci. Instrum. 73, 387 (2002).
[8] M. Ignatenko, A. Mase, L. G. Bruskin, Y. Kogi and H. Hojo, Rev. Sci. Instrum. 75, 3810 (2004).
[9] W. Duncan and V.P. Minerva, Proc. IRE 48, 156 (1960).
[10] W.R. Deal et al., IEEE Trans. Microwave Theory Tech. 48, 910 (2000).
[11] A. Ejiri, T. Yamada, Y. Adachi, O. Watanabe and Y. Takase, Phys. Control. Fusion 50, 065003 (2008).
[12] Z.B. Shi, Y. Nagayama, S. Yamaguchi, Y. Hamada and Y. Hirano, Plasma Fusion Res. 3, S1045 (2008).
[13] Y. Yagi et al., Plasma Phys. Control. Fusion 44, 335 (2002).
[14] L. Frassinetti et al., Plasma Phys. Control. Fusion 49, 199 (2007).
[15] Y. Hirano, H. Koguchi, K. Yambe, H. Sakakita and S. Kiyama, Phys. Plasmas 13, 122511 (2006).

This paper may be cited as follows:

Yoshio NAGAYAMA, Soichiro YAMAGUCHI, Zhongbing SHI, Yuichiro KOGI, Atsushi MASE, Shoji SUGITO, Yoichi HIRANO, Satoru KIYAMA, Haruhisa KOGUCHI, Hajime SAKAKITA, Kiyoyuki YAMBE and Nobuyoshi OHYABU, Plasma Fusion Res. 3, 053 (2008).