Direct Measurement of a Toroidally Directed Zonal Flow in a Toroidal Plasma

T. Nishizawa, A. F. Almagri, J. K. Anderson, W. Goodman, M. J. Pueschel, M. D. Nornberg, S. Ohshima, J. S. Sarff, P. W. Terry, Z. R. Williams

研究成果: ジャーナルへの寄稿学術誌査読

12 被引用数 (Scopus)


Zonal flow appears in toroidal, magnetically confined plasmas as part of the self-regulated interaction of turbulence and transport processes. For toroidal plasmas having a strong toroidal magnetic field, the zonal flow is predominately poloidally directed. This Letter reports the first observation of a zonal flow that is toroidally directed. The measurements are made just inside the last closed flux surface of reversed field pinch plasmas that have a dominant poloidal magnetic field. A limit cycle oscillation between the strength of the zonal flow and the amplitude of plasma potential fluctuations is observed, which provides evidence for the self-regulation characteristic of drift-wave-type plasma turbulence. The measurements help advance understanding and gyrokinetic modeling of toroidal plasmas in the pursuit of fusion energy.

ジャーナルPhysical review letters
出版ステータス出版済み - 3月 15 2019

!!!All Science Journal Classification (ASJC) codes

  • 物理学および天文学一般


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