[Table of Contents]

Plasma and Fusion Research

Volume 5, S2058 (2010)

Regular Articles

Toroidal Spin-Up and Velocity Shear of a Field-Reversed Configuration Plasma
Yuuki KOMORIYA, Yasuyuki HIRAYAMA, Yasuyuki FUJIKAWA, Tomohiko ASAI, Tsutomu TAKAHASHI, Yoshiki MATSUZAWA and Toshiki TAKAHASHI1)
College of Science and Technology, Nihon University, Kanda-Surugadai, tiyoda, Tokyo 101-0062, Japan
1)
Department of Electronic Engineering, Gunma University, Tenjin-cho, Kiryu, Gunma 376-0052, Japan
(Received 8 December 2009 / Accepted 24 March 2010 / Published 10 December 2010)

Abstract

A spatial distribution of toroidal flow in a field-reversed configuration plasma generated by the field-reversed theta-pinch method has been measured by an ion Doppler spectroscopy (IDS) system with a line-spectrum of impurity carbon (CV: 227.2 nm) and a Mach probe. With the IDS system, the axial profile of toroidal flow was observed. The observed results show different time evolutions of toroidal spin-up at around the midplane and end regions of the FRC. The radial profile of toroidal flow has also been observed on the weakly ionized plasma outside the separatrix with the Mach probe method. These results indicate propagation of toroidal momentum to the scrape-off plasma outward from the center.

Keywords

field-reversed configuration, n = 2 mode rotational instability, toroidal flow, flow shear, ion Doppler spectroscopy, Mach probe

DOI: 10.1585/pfr.5.S2058

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References

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This paper may be cited as follows:

Yuuki KOMORIYA, Yasuyuki HIRAYAMA, Yasuyuki FUJIKAWA, Tomohiko ASAI, Tsutomu TAKAHASHI, Yoshiki MATSUZAWA and Toshiki TAKAHASHI, Plasma Fusion Res. 5, S2058 (2010).