First observation of a new zonal-flow cycle state in the H-mode transport barrier of the experimental advanced superconducting Tokamak
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031 (China)
- Association Euratom-Riso DTU, DK-4000 Roskilde (Denmark)
- University of California, San Diego, 9500 Gilman Drive, La Jolla, California 92093 (United States)
- Department of Modern Physics, University of Science and Technology of China, Hefei 230026 (China)
A new turbulence-flow cycle state has been discovered after the formation of a transport barrier in the H-mode plasma edge during a quiescent phase on the EAST superconducting tokamak. Zonal-flow modulation of high-frequency-broadband (0.05-1 MHz) turbulence was observed in the steep-gradient region leading to intermittent transport events across the edge transport barrier. Good confinement (H{sub 98y,2} {approx} 1) has been achieved in this state, even with input heating power near the L-H transition threshold. A novel model based on predator-prey interaction between turbulence and zonal flows reproduced this state well.
- OSTI ID:
- 22072629
- Journal Information:
- Physics of Plasmas, Vol. 19, Issue 12; Other Information: (c) 2012 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 1070-664X
- Country of Publication:
- United States
- Language:
- English
Similar Records
The role of zonal flows and predator–prey oscillations in triggering the formation of edge and core transport barriers
The Center for Momentum Transport and Flow Organization in Plasmas - Final Scientific Report
Dynamics of turbulent transport dominated by the geodesic acoustic mode near the critical gradient regime
Journal Article
·
Thu Apr 24 00:00:00 EDT 2014
· Nuclear Fusion
·
OSTI ID:22072629
+15 more
The Center for Momentum Transport and Flow Organization in Plasmas - Final Scientific Report
Technical Report
·
Mon Dec 14 00:00:00 EST 2015
·
OSTI ID:22072629
Dynamics of turbulent transport dominated by the geodesic acoustic mode near the critical gradient regime
Journal Article
·
Thu May 15 00:00:00 EDT 2008
· Physics of Plasmas
·
OSTI ID:22072629
+1 more