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

Journal Article · Fri Apr 22 00:00:00 EDT 2016 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.4947206· OSTI ID:1470761

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

Huazhong Univ. of Science and Technology, Wuhan (China). State Key Lab. of Advanced Electromagnetic Engineering and Technology and School of Electrical and Electronic Engineering
Univ. of California, San Diego, CA (United States). Center for Momentum Transport and Flow Organization and Center for Astrophysics and Space Sciences

For this work, 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.

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Research Organization:: Univ. of California, San Diego, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Fusion Energy Sciences (FES); National Natural Science Foundation of China (NSFC); Ministry of Science and Technology (MOST) (China)

Grant/Contract Number:: FG02-04ER54738; 11305071; 2013GB112002

OSTI ID:: 1470761

Alternate ID(s):: OSTI ID: 1249679

Journal Information:: Physics of Plasmas, Vol. 23, Issue 4; ISSN 1070-664X

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 5 works

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