Studies of currentless, high-beta plasma in the Heliotron E device

198536 citationsJournal Article

Authors

O. Motojima · Kyoto University

F. Sano · Kyoto University

M. Sato · Kyoto University

Hiroshi Kaneko · Kyoto University

H. Zushi · Kyoto University

S. Sudo · Kyoto University

S. Besshou · Kyoto University

Abstract

A currentless plasma with a volume-averaged beta value of 2% has been produced with neutral beam heating. Target plasmas were created by second harmonic resonance heating with electron cyclotron waves (150–350 kW and 53.2 GHz) at a magnetic field strength of 0.94 T. Neutral beam injection (23–30 keV and 1.3−2.6 MW) was used to heat the plasma further. MHD stable and unstable high-beta plasmas were observed. The Q-mode plasmas were produced with the help of intense neutral gas puffing. Properties of the MHD activity and confinement of high-beta plasmas are discussed and compared with theoretical studies.

Topics & Keywords

Plasma Diagnostics and Applications Magnetic confinement fusion research Particle accelerators and beam dynamics

UN Sustainable Development Goals

Affordable and clean energy

Publication Details

Published in: Nuclear Fusion

Volume 25, Issue 12, pp. 1783-1787

DOI: 10.1088/0029-5515/25/12/009

Field-Weighted Citation Impact: 4.87