Intrinsic rotation drive by collisionless trapped electron mode turbulence

Wang, Lu; Peng, Shuitao; Diamond, P. H.

doi:10.1063/1.4947206

Title: Intrinsic rotation drive by collisionless trapped electron mode turbulence

Abstract

Both the parallel residual stress and parallel turbulent acceleration driven by electrostatic collisionless trapped electron mode (CTEM) turbulence are calculated analytically using gyrokinetic theory. Quasilinear results show that the parallel residual stress contributes an outward flux of co-current rotation for normal magnetic shear and turbulence intensity profile increasing outward. This may induce intrinsic counter-current rotation or flattening of the co-current rotation profile. The parallel turbulent acceleration driven by CTEM turbulence vanishes, due to the absence of a phase shift between density fluctuation and ion pressure fluctuation. This is different from the case of ion temperature gradient turbulence, for which the turbulent acceleration can provide co-current drive for normal magnetic shear and turbulence intensity profile increasing outward. Its order of magnitude is predicted to be the same as that of the divergence of the residual stress [L. Wang and P. H. Diamond, Phys. Rev. Lett. 110, 265006 (2013)]. A possible connection of these theoretical results to experimental observations of electron cyclotron heating effects on toroidal rotation is discussed.

Authors:

Wang, Lu; Peng, Shuitao ^[1]; Diamond, P. H. ^[2]

State Key Laboratory of Advanced Electromagnetic Engineering and Technology, School of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan 430074 (China)
Center for Momentum Transport and Flow Organization and Center for Astrophysics and Space Sciences, University of California at San Diego, La Jolla, California 92093-0424 (United States)

Publication Date:: Fri Apr 15 00:00:00 EDT 2016

OSTI Identifier:: 22599123

Resource Type:: Journal Article

Journal Name:: Physics of Plasmas

Additional Journal Information:: Journal Volume: 23; Journal Issue: 4; Other Information: (c) 2016 Author(s); 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; AUGMENTATION; COUNTER CURRENT; CYCLOTRONS; DENSITY; DIAMONDS; ECR HEATING; FLUCTUATIONS; ION TEMPERATURE; IONS; PHASE SHIFT; RESIDUAL STRESSES; ROTATING PLASMA; SHEAR; TEMPERATURE GRADIENTS; TRAPPED ELECTRONS; TRAPPING; TURBULENCE

Citation Formats


                    Wang, Lu, Peng, Shuitao, and Diamond, P. H. Intrinsic rotation drive by collisionless trapped electron mode turbulence.  United States: N. p., 2016. 
        Web.  doi:10.1063/1.4947206.

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                    Wang, Lu, Peng, Shuitao, & Diamond, P. H. Intrinsic rotation drive by collisionless trapped electron mode turbulence.  United States.  https://doi.org/10.1063/1.4947206

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                    Wang, Lu, Peng, Shuitao, and Diamond, P. H. 2016.  
        "Intrinsic rotation drive by collisionless trapped electron mode turbulence".  United States.  https://doi.org/10.1063/1.4947206.

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@article{osti_22599123,

  title        = {Intrinsic rotation drive by collisionless trapped electron mode turbulence},

  author       = {Wang, Lu and Peng, Shuitao and Diamond, P. H.},

  abstractNote = {Both the parallel residual stress and parallel turbulent acceleration driven by electrostatic collisionless trapped electron mode (CTEM) turbulence are calculated analytically using gyrokinetic theory. Quasilinear results show that the parallel residual stress contributes an outward flux of co-current rotation for normal magnetic shear and turbulence intensity profile increasing outward. This may induce intrinsic counter-current rotation or flattening of the co-current rotation profile. The parallel turbulent acceleration driven by CTEM turbulence vanishes, due to the absence of a phase shift between density fluctuation and ion pressure fluctuation. This is different from the case of ion temperature gradient turbulence, for which the turbulent acceleration can provide co-current drive for normal magnetic shear and turbulence intensity profile increasing outward. Its order of magnitude is predicted to be the same as that of the divergence of the residual stress [L. Wang and P. H. Diamond, Phys. Rev. Lett. 110, 265006 (2013)]. A possible connection of these theoretical results to experimental observations of electron cyclotron heating effects on toroidal rotation is discussed.},

  doi          = {10.1063/1.4947206},

  url          = {https://www.osti.gov/biblio/22599123},
  journal      = {Physics of Plasmas},

  issn         = {1070-664X},

  number       = 4,

  volume       = 23,

  place        = {United States},

  year         = {Fri Apr 15 00:00:00 EDT 2016},

  month        = {Fri Apr 15 00:00:00 EDT 2016}

}

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Works referencing / citing this record:

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https://doi.org/10.1088/1741-4326/ab1a72

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Title: Intrinsic rotation drive by collisionless trapped electron mode turbulence

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