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The life-cycle of drift-wave turbulence driven by small scale instability
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Connaughton, Colm, Nazarenko, Sergey and Quinn, Brenda E. (2010) The life-cycle of drift-wave turbulence driven by small scale instability. UNSPECIFIED. -: -. ArXiv pre-print . (Unpublished)
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Abstract
We demonstrate theoretically and numerically the zonal-flow/drift-wave feedback mechanism for the LH transition in an idealised model of plasma turbulence driven by a small scale instability. Zonal flows are generated by a secondary modulational instability of the modes which are directly driven by the primary instability. The zonal flows then suppress the small scales thereby arresting the energy injection into the system, a process which can be described using nonlocal wave turbulence theory. Finally, the arrest of the energy input results in saturation of the zonal flows at a level which can be estimated from the theory and the system reaches stationarity without damping of the large scales.
Item Type: | Working or Discussion Paper (UNSPECIFIED) | ||||
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Subjects: | Q Science > QA Mathematics Q Science > QC Physics |
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Divisions: | Faculty of Science, Engineering and Medicine > Research Centres > Centre for Complexity Science Faculty of Science, Engineering and Medicine > Science > Mathematics |
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Library of Congress Subject Headings (LCSH): | Plasma instabilities, Plasma turbulence, Waves -- Mathematical models, Nuclear fusion | ||||
Series Name: | ArXiv pre-print | ||||
Publisher: | - | ||||
Place of Publication: | - | ||||
Official Date: | December 2010 | ||||
Dates: |
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Status: | Peer Reviewed | ||||
Publication Status: | Unpublished | ||||
Access rights to Published version: | Restricted or Subscription Access | ||||
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