Quasi 3D ECE imaging system for study of MHD instabilities in KSTAR

201475 citationsJournal Articlebronze Open Access

Authors

G.S. Yun · Pohang University of Science and Technology

W. Lee · Ulsan National Institute of Science and Technology

M. Choi · Pohang University of Science and Technology

J. Lee · Pohang University of Science and Technology

Minseok Kim · Pohang University of Science and Technology

J. Leem · Pohang University of Science and Technology

Y.U. Nam

Abstract

A second electron cyclotron emission imaging (ECEI) system has been installed on the KSTAR tokamak, toroidally separated by 1/16th of the torus from the first ECEI system. For the first time, the dynamical evolutions of MHD instabilities from the plasma core to the edge have been visualized in quasi-3D for a wide range of the KSTAR operation (B0 = 1.7∼3.5 T). This flexible diagnostic capability has been realized by substantial improvements in large-aperture quasi-optical microwave components including the development of broad-band polarization rotators for imaging of the fundamental ordinary ECE as well as the usual 2nd harmonic extraordinary ECE.

Topics & Keywords

Magnetic confinement fusion research Particle accelerators and beam dynamics Ionosphere and magnetosphere dynamics

UN Sustainable Development Goals

Affordable and clean energy

Publication Details

Published in: Review of Scientific Instruments

Volume 85, Issue 11, pp. 11D820-11D820

DOI: 10.1063/1.4890401

Field-Weighted Citation Impact: 11.09