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Title: Ion temperature gradient turbulence in helical and axisymmetric RFP plasmas

Turbulence induced by the ion temperature gradient (ITG) is investigated in the helical and axisymmetric plasma states of a reversed field pinch device by means of gyrokinetic calculations. The two magnetic configurations are systematically compared, both linearly and nonlinearly, in order to evaluate the impact of the geometry on the instability and its ensuing transport, as well as on the production of zonal flows. Despite its enhanced confinement, the high-current helical state demonstrates a lower ITG stability threshold compared to the axisymmetric state, and ITG turbulence is expected to become an important contributor to the total heat transport.
Authors:
 [1] ;  [2]
  1. Consorzio RFX, Corso Stati Uniti 4, 35127 Padova (Italy)
  2. Max-Planck-Institut f├╝r Plasmaphysik, Wendelsteinstra├če 1, 17491 Greifswald (Germany)
Publication Date:
OSTI Identifier:
22410311
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 22; Journal Issue: 5; Other Information: (c) 2015 EURATOM; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; AXIAL SYMMETRY; HEAT TRANSFER; ION TEMPERATURE; MAGNETIC FIELD CONFIGURATIONS; PLASMA CONFINEMENT; PLASMA INSTABILITY; REVERSED-FIELD PINCH DEVICES; TEMPERATURE GRADIENTS; TURBULENCE