Intrinsic rotation drive by collisionless trapped electron mode turbulence

Journal Article · Fri Apr 15 00:00:00 EDT 2016 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.4947206· OSTI ID:22599123

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

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1. State Key Laboratory of Advanced Electromagnetic Engineering and Technology, School of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan 430074 (China)
2. 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)

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.

• OSTI ID: 22599123
• Journal Information: Physics of Plasmas, Vol. 23, Issue 4; Other Information: (c) 2016 Author(s); Country of input: International Atomic Energy Agency (IAEA); ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

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