How turbulence fronts induce plasma spin-up

Y. Kosuga; S. I. Itoh; P. H. Diamond; K. Itoh

doi:10.1103/PhysRevE.95.031203

How turbulence fronts induce plasma spin-up

Y. Kosuga, S. I. Itoh, P. H. Diamond, K. Itoh

Research output: Contribution to journal › Article › peer-review

5 Citations (Scopus)

Abstract

A calculation which describes the spin-up of toroidal plasmas by the radial propagation of turbulence fronts with broken parallel symmetry is presented. The associated flux of parallel momentum is calculated by using a two-scale direct-interaction approximation in the weak turbulence limit. We show that fluctuation momentum spreads faster than mean flow momentum. Specifically, the turbulent flux of wave momentum is stronger than the momentum pinch. The scattering of fluctuation momentum can induce edge-core coupling of toroidal flows, as observed in experiments.

Original language	English
Article number	031203
Journal	Physical Review E
Volume	95
Issue number	3
DOIs	https://doi.org/10.1103/PhysRevE.95.031203
Publication status	Published - Mar 29 2017

All Science Journal Classification (ASJC) codes

Statistical and Nonlinear Physics
Statistics and Probability
Condensed Matter Physics

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10.1103/PhysRevE.95.031203

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title = "How turbulence fronts induce plasma spin-up",

abstract = "A calculation which describes the spin-up of toroidal plasmas by the radial propagation of turbulence fronts with broken parallel symmetry is presented. The associated flux of parallel momentum is calculated by using a two-scale direct-interaction approximation in the weak turbulence limit. We show that fluctuation momentum spreads faster than mean flow momentum. Specifically, the turbulent flux of wave momentum is stronger than the momentum pinch. The scattering of fluctuation momentum can induce edge-core coupling of toroidal flows, as observed in experiments.",

author = "Y. Kosuga and Itoh, {S. I.} and Diamond, {P. H.} and K. Itoh",

note = "Funding Information: This work is partly supported by Grants-in-Aid for Scientific Research of JSPS of Japan (JP15K17799, JP15H02155, JP16H02442), Asada Science Foundation, Kyushu University Interdisciplinary Programs in Education and Projects in Research Development (26705), and Kyushu University QR Research Program (28315). Publisher Copyright: {\textcopyright}2017 American Physical Society.",

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doi = "10.1103/PhysRevE.95.031203",

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AU - Kosuga, Y.

AU - Itoh, S. I.

AU - Diamond, P. H.

AU - Itoh, K.

N1 - Funding Information: This work is partly supported by Grants-in-Aid for Scientific Research of JSPS of Japan (JP15K17799, JP15H02155, JP16H02442), Asada Science Foundation, Kyushu University Interdisciplinary Programs in Education and Projects in Research Development (26705), and Kyushu University QR Research Program (28315). Publisher Copyright: ©2017 American Physical Society.

PY - 2017/3/29

Y1 - 2017/3/29

N2 - A calculation which describes the spin-up of toroidal plasmas by the radial propagation of turbulence fronts with broken parallel symmetry is presented. The associated flux of parallel momentum is calculated by using a two-scale direct-interaction approximation in the weak turbulence limit. We show that fluctuation momentum spreads faster than mean flow momentum. Specifically, the turbulent flux of wave momentum is stronger than the momentum pinch. The scattering of fluctuation momentum can induce edge-core coupling of toroidal flows, as observed in experiments.

AB - A calculation which describes the spin-up of toroidal plasmas by the radial propagation of turbulence fronts with broken parallel symmetry is presented. The associated flux of parallel momentum is calculated by using a two-scale direct-interaction approximation in the weak turbulence limit. We show that fluctuation momentum spreads faster than mean flow momentum. Specifically, the turbulent flux of wave momentum is stronger than the momentum pinch. The scattering of fluctuation momentum can induce edge-core coupling of toroidal flows, as observed in experiments.

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VL - 95

JO - Physical Review E

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How turbulence fronts induce plasma spin-up

Abstract

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