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Direct Measurement of a Toroidally Directed Zonal Flow in a Toroidal Plasma.
Nishizawa, T; Almagri, A F; Anderson, J K; Goodman, W; Pueschel, M J; Nornberg, M D; Ohshima, S; Sarff, J S; Terry, P W; Williams, Z R.
Afiliação
  • Nishizawa T; Department of Physics, University of Wisconsin-Madison, Madison, Wisconsin 53706, USA.
  • Almagri AF; Department of Physics, University of Wisconsin-Madison, Madison, Wisconsin 53706, USA.
  • Anderson JK; Department of Physics, University of Wisconsin-Madison, Madison, Wisconsin 53706, USA.
  • Goodman W; Electrical Engineering Department, University of Wisconsin-Madison, Madison, Wisconsin 53706, USA.
  • Pueschel MJ; Institute for Fusion Studies, University of Texas at Austin, Austin, Texas 78712, USA.
  • Nornberg MD; Department of Physics, University of Wisconsin-Madison, Madison, Wisconsin 53706, USA.
  • Ohshima S; Institute of Advanced Energy, Kyoto University, Uji, Kyoto 611-0011, Japan.
  • Sarff JS; Department of Physics, University of Wisconsin-Madison, Madison, Wisconsin 53706, USA.
  • Terry PW; Department of Physics, University of Wisconsin-Madison, Madison, Wisconsin 53706, USA.
  • Williams ZR; Department of Physics, University of Wisconsin-Madison, Madison, Wisconsin 53706, USA.
Phys Rev Lett ; 122(10): 105001, 2019 Mar 15.
Article em En | MEDLINE | ID: mdl-30932630
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.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Tipo de estudo: Prognostic_studies Idioma: En Revista: Phys Rev Lett Ano de publicação: 2019 Tipo de documento: Article País de afiliação: Estados Unidos
Texto completo
Adicionar na Minha BVS
Imprimir
XML
PubMed Links
Buscar no Google

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Tipo de estudo: Prognostic_studies Idioma: En Revista: Phys Rev Lett Ano de publicação: 2019 Tipo de documento: Article País de afiliação: Estados Unidos