Development of Glass-Tube-Pair Type Doppler Probe Array for 1D Profile Measurement of Two Component Ion-Flow Vector

DOI Web Site 9 References Open Access
  • SOMEYA Ryo
    Graduate School of Frontier Sciences, The University of Tokyo
  • TANAKA Haruaki
    Graduate School of Frontier Sciences, The University of Tokyo
  • FUNATO Yugo
    Graduate School of Frontier Sciences, The University of Tokyo
  • CAI Yunhan
    Graduate School of Frontier Sciences, The University of Tokyo
  • AKIMITSU Moe
    Graduate School of Frontier Sciences, The University of Tokyo
  • TANABE Hiroshi
    Graduate School of Frontier Sciences, The University of Tokyo
  • ONO Yasushi
    Graduate School of Frontier Sciences, The University of Tokyo

Abstract

<p>We developed a new glass-tube-pair type Doppler probe array for 1D ion velocity vector and temperature measurement. It needs just two parallel glass-tube insertion, realizing low plasma perturbation and 1D ion flow vector measurement on a single discharge. Using four mirrors and optical fibers for one measurement point, this system can measure ion local light emissions of each measurement volume from four different directions, enabling us to measure local ion flow vector and temperature. All set of mirrors and optical fibers are aligned in the two parallel glass tubes for 1D measurement by a single discharge. This system measured successfully ion outflow speed of two merging tokamak plasmas, about 80% of poloidal Alfvén speed in agreement with recent reconnection experiments and theory.</p>

Journal

  • Plasma and Fusion Research

    Plasma and Fusion Research 16 (0), 1202078-1202078, 2021-06-07

    The Japan Society of Plasma Science and Nuclear Fusion Research

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