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Title: Finite ballooning angle effects on ion temperature gradient driven mode in gyrokinetic flux tube simulations

This paper presents effects of finite ballooning angles on linear ion temperature gradient (ITG) driven mode and associated heat and momentum flux in Gyrokinetic flux tube simulation GENE. It is found that zero ballooning angle is not always the one at which the linear growth rate is maximum. The ITG mode acquires a short wavelength (SW) branch (k{sub ⊥}ρ{sub i} > 1) when growth rates maximized over all ballooning angles are considered. However, the SW branch disappears on reducing temperature gradient showing characteristics of zero ballooning angle SWITG in case of extremely high temperature gradient. Associated heat flux is even with respect to ballooning angle and maximizes at nonzero ballooning angle while the parallel momentum flux is odd with respect to the ballooning angle.
Authors:
 [1] ;  [2] ;  [3] ;  [1] ;  [4]
  1. Institute for Plasma Research, Bhat Gandhinagar, Gujarat 2382 428 (India)
  2. (France)
  3. CRPP, Ecole Polytechnique Federale de Lausanne, CH-1015 Lausanne (Switzerland)
  4. Max-Planck-Institut fur Plasmaphysik, EURATOM Association, D-85748 Garching (Germany)
Publication Date:
OSTI Identifier:
22251904
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 21; Journal Issue: 3; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; BALLOONING INSTABILITY; HEAT FLUX; ION TEMPERATURE; SIMULATION; TEMPERATURE GRADIENTS; TEMPERATURE RANGE 0400-1000 K; TUBES