PMID: 22587261May 17, 2012Paper

Role of zonal flow predator-prey oscillations in triggering the transition to H-mode confinement

Physical Review Letters
L SchmitzG Wang

Abstract

Direct evidence of zonal flow (ZF) predator-prey oscillations and the synergistic roles of ZF- and equilibrium E×B flow shear in triggering the low- to high-confinement (L- to H-mode) transition in the DIII-D tokamak is presented. Periodic turbulence suppression is first observed in a narrow layer at and just inside the separatrix when the shearing rate transiently exceeds the turbulence decorrelation rate. The final transition to H mode with sustained turbulence and transport reduction is controlled by equilibrium E×B shear due to the increasing ion pressure gradient.

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Citations

Nov 29, 2014·The Review of Scientific Instruments·L ZengG Wang
Jun 19, 2013·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·Madalina Vlad
Feb 27, 2016·Physical Review Letters·J C HillesheimUNKNOWN EUROfusion Consortium, JET, Culham Science Centre, Abingdon, Oxon OX14 3DB, United Kingdom
Jul 16, 2013·Physical Review Letters·J ChengUNKNOWN HL-2A Team
Jan 24, 2015·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·L BardócziL Schmitz
Apr 2, 2019·Physical Review Letters·T NishizawaZ R Williams
Apr 5, 2013·Physical Review Letters·G BirkenmeierU Stroth
Jul 2, 2018·The Review of Scientific Instruments·S ZoletnikT Krizsanóczi
May 28, 2013·Physical Review Letters·K MikiG R Tynan
May 16, 2014·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·Z B GuoÖ D Gürcan

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