[Table of Contents]

Plasma and Fusion Research

Volume 5, S2031 (2010)

Regular Articles


Characteristic of a Repetitively Injected Spheromak in a Vertical Guide-Field
Hirotomo ITAGAKI, Hiroto NUMAZAWA, Kaori KISHI, Yuki TERASHIMA, Yuki FUJITA, Takeshi AWANE, Tomohiko ASAI, Tsutomu TAKAHASHI and Yoichi HIRANO
Nihon University, Chiyoda-ku, Tokyo 101-8308, Japan
(Received 9 December 2009 / Accepted 28 March 2010 / Published 10 December 2010)

Abstract

Amplified poloidal flux of spheromak has been observed in the repetitive discharge (50 kHz) of magnetized coaxial plasma gun (MCPG). In this experiment, ejected spheromak is confined within magnetic mirror configuration, and generated flux and emission has been measured. In the case of repetitive discharge, increased poloidal flux and its decay time compared to quasi-DC discharge has been observed. Also increased emission light and its decay time has been observed. These results indicates increasing of energy confinement time. In addition, global stabilization of behavior of spheromaks when it is transporting in discharge tube has been observed in repetitive discharge case.


Keywords

magnetized coaxial plasma gun, spheromak, repetitive injection, magnetic helicity, vertical guide field

DOI: 10.1585/pfr.5.S2031


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This paper may be cited as follows:

Hirotomo ITAGAKI, Hiroto NUMAZAWA, Kaori KISHI, Yuki TERASHIMA, Yuki FUJITA, Takeshi AWANE, Tomohiko ASAI, Tsutomu TAKAHASHI and Yoichi HIRANO, Plasma Fusion Res. 5, S2031 (2010).