Articolo in rivista, 2005, ENG, 10.1103/PhysRevLett.94.135001
Vianello N.; Spada E.; Antoni V.; Spolaore M.; Serianni G.; Regnoli G.; Cavazzan R.; Bergsåker H.; Drake J.R.
1-5,7 : Assoc EURATOM ENEA Fus, Consorzio RFX, I-35127 Padua, Italy / 8-9 : Alfvèn Laboratory, Royal Institute of Technology, Association EURATOM/VR, SE 100 44 Stockholm, Sweden / 3 : Associazione EURATOM-ENEA sulla fusione, C.R. Frascati, via E. Fermi 45, 00044, Frascati, Italy
The momentum balance has been applied to the ExB flow in the edge region of a reversed field pinch (RFP) configuration. All terms, including those involving fluctuations, have been measured in stationary condition in the edge region of the Extrap-T2R RFP experiment. It is found that the component of the Reynolds stress driven by electrostatic fluctuations is the term playing the major role in driving the shear of the ExB flow to a value marginal for turbulent suppression, so that the results are in favor of a turbulence self-regulating mechanism underlying the momentum balance at the edge. Balancing the sheared flow driving and damping terms, the plasma viscosity is found anomalous and consistent with the diffusivity due to electrostatic turbulence.
Physical review letters (Print) 94 (13), pp. 135001-1–135001-4
REVERSED-FIELD PINCH, REYNOLDS STRESS, ELECTROSTATIC TURBULENCE, POLOIDAL FLOW
Antoni Vanni, Serianni Gianluigi, Vianello Nicola, Spolaore Monica
ID: 26235
Year: 2005
Type: Articolo in rivista
Creation: 2012-01-03 00:00:00.000
Last update: 2022-09-21 17:06:37.000
CNR institutes
External IDs
CNR OAI-PMH: oai:it.cnr:prodotti:26235
DOI: 10.1103/PhysRevLett.94.135001
ISI Web of Science (WOS): 000228289000027
Scopus: 2-s2.0-18144386226