Collisional bulk ion transport and poloidal rotation driven by neutral beam injection

Newton, Sarah L; Helander, Per; Catto, Peter J

doi:10.1063/1.2734181

Title: Collisional bulk ion transport and poloidal rotation driven by neutral beam injection

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Abstract

Neutral beam injection (NBI) is known to significantly affect radial transport in a tokamak plasma. Furthermore, recent observations have shown poloidal velocities, in the presence of NBI, significantly in excess of the standard neoclassical value. Motivated by this, the additional collisional radial bulk ion fluxes of particles, heat and toroidal angular momentum, and the poloidal velocity, driven by fast ions from NBI have been evaluated for a low-collisionality, pure plasma, with strong toroidal rotation and arbitrary aspect ratio. Higher order velocity space structure of the fast ion distribution function can be significant, whilst the effects of toroidal acceleration caused by strong NBI dominate at large aspect ratio. The driven poloidal velocity depends strongly on system parameters, becoming larger at higher beam density and lower beam energy.

Authors:

Newton, Sarah L; Helander, Per; Catto, Peter J ^[1]

H. H. Wills Physics Laboratory, University of Bristol, Royal Fort, Tyndall Avenue, Bristol BS8 1TL (United Kingdom)

Publication Date:: Fri Jun 15 00:00:00 EDT 2007

OSTI Identifier:: 20975109

Resource Type:: Journal Article

Journal Name:: Physics of Plasmas

Additional Journal Information:: Journal Volume: 14; Journal Issue: 6; Other Information: DOI: 10.1063/1.2734181; (c) 2007 U.S. Government; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1070-664X

Country of Publication:: United States

Language:: English

Subject:: 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ACCELERATION; ANGULAR MOMENTUM; ASPECT RATIO; CONFINEMENT; DISTRIBUTION FUNCTIONS; HEATING; ION BEAMS; IONS; NEOCLASSICAL TRANSPORT THEORY; PLASMA; PLASMA BEAM INJECTION; ROTATION; TOKAMAK DEVICES

Citation Formats


                    Newton, Sarah L, Helander, Per, Catto, Peter J, Stellarator Theory Division, Max Planck Institute for Plasma Physics, Wendelsteinstrasse 1, 17491 Greifswald, and Plasma Science and Fusion Center, Massachusetts Institute of Technology, 77 Massachusetts Avenue, NW16, Cambridge, Massachusetts 02139. Collisional bulk ion transport and poloidal rotation driven by neutral beam injection.  United States: N. p., 2007. 
        Web.  doi:10.1063/1.2734181.

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                    Newton, Sarah L, Helander, Per, Catto, Peter J, Stellarator Theory Division, Max Planck Institute for Plasma Physics, Wendelsteinstrasse 1, 17491 Greifswald, & Plasma Science and Fusion Center, Massachusetts Institute of Technology, 77 Massachusetts Avenue, NW16, Cambridge, Massachusetts 02139. Collisional bulk ion transport and poloidal rotation driven by neutral beam injection.  United States.  https://doi.org/10.1063/1.2734181

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                    Newton, Sarah L, Helander, Per, Catto, Peter J, Stellarator Theory Division, Max Planck Institute for Plasma Physics, Wendelsteinstrasse 1, 17491 Greifswald, and Plasma Science and Fusion Center, Massachusetts Institute of Technology, 77 Massachusetts Avenue, NW16, Cambridge, Massachusetts 02139. 2007.  
        "Collisional bulk ion transport and poloidal rotation driven by neutral beam injection".  United States.  https://doi.org/10.1063/1.2734181.

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@article{osti_20975109,

  title        = {Collisional bulk ion transport and poloidal rotation driven by neutral beam injection},

  author       = {Newton, Sarah L and Helander, Per and Catto, Peter J and Stellarator Theory Division, Max Planck Institute for Plasma Physics, Wendelsteinstrasse 1, 17491 Greifswald and Plasma Science and Fusion Center, Massachusetts Institute of Technology, 77 Massachusetts Avenue, NW16, Cambridge, Massachusetts 02139},

  abstractNote = {Neutral beam injection (NBI) is known to significantly affect radial transport in a tokamak plasma. Furthermore, recent observations have shown poloidal velocities, in the presence of NBI, significantly in excess of the standard neoclassical value. Motivated by this, the additional collisional radial bulk ion fluxes of particles, heat and toroidal angular momentum, and the poloidal velocity, driven by fast ions from NBI have been evaluated for a low-collisionality, pure plasma, with strong toroidal rotation and arbitrary aspect ratio. Higher order velocity space structure of the fast ion distribution function can be significant, whilst the effects of toroidal acceleration caused by strong NBI dominate at large aspect ratio. The driven poloidal velocity depends strongly on system parameters, becoming larger at higher beam density and lower beam energy.},

  doi          = {10.1063/1.2734181},

  url          = {https://www.osti.gov/biblio/20975109},
  journal      = {Physics of Plasmas},

  issn         = {1070-664X},

  number       = 6,

  volume       = 14,

  place        = {United States},

  year         = {Fri Jun 15 00:00:00 EDT 2007},

  month        = {Fri Jun 15 00:00:00 EDT 2007}

}

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