Preliminary results from a novel ECE imaging system under various RF heating schemes on EAST

POSTER

Abstract

A novel 384 channel electron cyclotron emission imaging system is installed on EAST with wide-band electronics that enables a continuous radial coverage up to 30 cm and a flexible vertical coverage up to 80 cm controlled by zoom optics. Recent investigations of the plasma current ramp-up and plateau phases reveal various kinds of MHD activities. Detailed 2D ECE images in those phases have revealed different mechanisms around sawtooth crashes. 2D ECE imaging under various auxiliary heating schemes has revealed a superposition of various MHD modes with different harmonics, and the response of these modes to RF power modulation has been studied. Furthermore, low frequency up-chirping modes during LHCD have been observed. Finally, the application of several novel analysis techniques for 2D microwave imaging data is discussed.

Authors

  • Chen Luo

    USTC

  • Bingxi Gao

    USTC

  • Yilun Zhu

    USTC

  • Jinlin Xie

    University of Science and Technology of China, USTC

  • T. Lan

    USTC, USTC, China

  • Ah Di Liu

    USTC, University of Science and Technology of China

  • Hong Li

    USTC

  • Wandong Liu

    USTC

  • Changxuan Yu

    USTC

  • B.J. Tobias

    Princeton Plasma Physics Laboratory, PPPL, Princeton Plasma Physics Lab

  • C.W. Domier

    University of California - Davis, Univ. California, Davis, CA, UC-Davis, U.C. Davis, University of California at Davis, Univ. California, Davis, University of California, Davis, U. California-Davis

  • N.C. Luhmann, Jr.

    University of California - Davis, Univ. California, Davis, CA, U.C. Davis, University of California at Davis, Univ. California, Davis, U. California-Davis

  • A.J.H. Donn\'e

    DIFFER, FOM-DIFFER and Eindhoven Univ. of Tech., The Netherlands

  • ECE Team

    ASIPP

  • Liqun Hu

    ASIPP