Linear gyrokinetic calculations of toroidal momentum transport in the presence of trapped electron modes in tokamak plasmas

Kluy, N; Angioni, C; Camenen, Y; Peeters, A G

doi:10.1063/1.3271411

Title: Linear gyrokinetic calculations of toroidal momentum transport in the presence of trapped electron modes in tokamak plasmas

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Abstract

The toroidal momentum transport in the presence of trapped electron mode microinstabilities in tokamak plasmas is studied by means of quasilinear gyrokinetic calculations. In particular, the role of the Coriolis drift in producing an inward convection of toroidal momentum is investigated. The Coriolis drift term has been implemented in the gyrokinetic code GS2 [W. Dorland et al., Phys. Rev. Lett. 85, 5579 (2000)] specifically for the completion of this work. A benchmark between the GS2 implementation of the Coriolis drift and the implementations included in two other gyrokinetic codes is presented. The numerical calculations show that in the presence of trapped electron modes, despite of a weaker symmetry breaking of the eigenfunctions with respect to the case of ion temperature gradient modes, a pinch of toroidal momentum is produced in most conditions. The toroidal momentum viscosity is also computed, and found to be small as compared with the electron heat conductivity, but significantly larger than the ion heat conductivity. In addition, interesting differences are found in the dependence of the toroidal momentum pinch as a function of collisionality between trapped electron modes and ion temperature gradient modes. The results identify also parameter domains in which the pinch is predicted tomore »« less

Authors:

Kluy, N; Angioni, C ^[1]; Camenen, Y; Peeters, A G ^[2]

Max-Planck-Institut fuer Plasmaphysik, IPP-EURATOM Association, D-85748 Garching bei Muenchen (Germany)
Department of Physics, Center for Fusion, Space, and Astrophysics, University of Warwick, Coventry CV4 7AL (United Kingdom)

Publication Date:: Tue Dec 15 00:00:00 EST 2009

OSTI Identifier:: 21371315

Resource Type:: Journal Article

Journal Name:: Physics of Plasmas

Additional Journal Information:: Journal Volume: 16; Journal Issue: 12; Other Information: DOI: 10.1063/1.3271411; (c) 2009 American Institute of Physics; Journal ID: ISSN 1070-664X

Country of Publication:: United States

Language:: English

Subject:: 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; BENCHMARKS; CORIOLIS FORCE; EIGENFUNCTIONS; ION TEMPERATURE; PLASMA; PLASMA MICROINSTABILITIES; PLASMA SIMULATION; SYMMETRY BREAKING; TEMPERATURE GRADIENTS; TOKAMAK DEVICES; TRAPPED ELECTRONS; CLOSED PLASMA DEVICES; ELECTRONS; ELEMENTARY PARTICLES; FERMIONS; FUNCTIONS; INSTABILITY; LEPTONS; PLASMA INSTABILITY; SIMULATION; THERMONUCLEAR DEVICES

Citation Formats


                    Kluy, N, Angioni, C, Camenen, Y, and Peeters, A G. Linear gyrokinetic calculations of toroidal momentum transport in the presence of trapped electron modes in tokamak plasmas.  United States: N. p., 2009. 
        Web.  doi:10.1063/1.3271411.

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                    Kluy, N, Angioni, C, Camenen, Y, & Peeters, A G. Linear gyrokinetic calculations of toroidal momentum transport in the presence of trapped electron modes in tokamak plasmas.  United States.  https://doi.org/10.1063/1.3271411

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                    Kluy, N, Angioni, C, Camenen, Y, and Peeters, A G. 2009.  
        "Linear gyrokinetic calculations of toroidal momentum transport in the presence of trapped electron modes in tokamak plasmas".  United States.  https://doi.org/10.1063/1.3271411.

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@article{osti_21371315,

  title        = {Linear gyrokinetic calculations of toroidal momentum transport in the presence of trapped electron modes in tokamak plasmas},

  author       = {Kluy, N and Angioni, C and Camenen, Y and Peeters, A G},

  abstractNote = {The toroidal momentum transport in the presence of trapped electron mode microinstabilities in tokamak plasmas is studied by means of quasilinear gyrokinetic calculations. In particular, the role of the Coriolis drift in producing an inward convection of toroidal momentum is investigated. The Coriolis drift term has been implemented in the gyrokinetic code GS2 [W. Dorland et al., Phys. Rev. Lett. 85, 5579 (2000)] specifically for the completion of this work. A benchmark between the GS2 implementation of the Coriolis drift and the implementations included in two other gyrokinetic codes is presented. The numerical calculations show that in the presence of trapped electron modes, despite of a weaker symmetry breaking of the eigenfunctions with respect to the case of ion temperature gradient modes, a pinch of toroidal momentum is produced in most conditions. The toroidal momentum viscosity is also computed, and found to be small as compared with the electron heat conductivity, but significantly larger than the ion heat conductivity. In addition, interesting differences are found in the dependence of the toroidal momentum pinch as a function of collisionality between trapped electron modes and ion temperature gradient modes. The results identify also parameter domains in which the pinch is predicted to be small, which are also of interest for comparisons with the experiments.},

  doi          = {10.1063/1.3271411},

  url          = {https://www.osti.gov/biblio/21371315},
  journal      = {Physics of Plasmas},

  issn         = {1070-664X},

  number       = 12,

  volume       = 16,

  place        = {United States},

  year         = {Tue Dec 15 00:00:00 EST 2009},

  month        = {Tue Dec 15 00:00:00 EST 2009}

}

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