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Study of nonlinear energy transfer b...

Xu, Min.

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Study of nonlinear energy transfer between drift wave turbulence and spontaneously generated sheared flows in a laboratory plasma.

Record Type:	Language materials, printed : Monograph/item
Title/Author:	Study of nonlinear energy transfer between drift wave turbulence and spontaneously generated sheared flows in a laboratory plasma./
Author:	Xu, Min.
Description:	178 p.
Notes:	Source: Dissertation Abstracts International, Volume: 71-10, Section: B, page: 6190.
Contained By:	Dissertation Abstracts International71-10B.
Subject:	Physics, Fluid and Plasma. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3419810
ISBN:	9781124201375

Study of nonlinear energy transfer between drift wave turbulence and spontaneously generated sheared flows in a laboratory plasma.
Xu, Min.

Study of nonlinear energy transfer between drift wave turbulence and spontaneously generated sheared flows in a laboratory plasma. - 178 p.

Source: Dissertation Abstracts International, Volume: 71-10, Section: B, page: 6190.

Thesis (Ph.D.)--University of California, San Diego, 2010.

Experiments in a laboratory plasma are used to identify how small-scale turbulent structures give rise to large-scale sheared zonal flows. A new technique based on cross-bispectral analysis has been developed and applied to directly measure the nonlinear energy transfer rates between drift wave turbulence and sheared flows. In addition fast imaging is used to directly observe the turbulent structure dynamics. A combined study using both Langmiur probe arrays and fast visible light imaging shows that the sheared zonal flow is sustained by the emission of drift vortices in the central plasma which then propagate in a spiral trajectory, approach the shear layer, and then merge into the sheared flow, thereby transferring their momentum and kinetic energy to it. The shear flow is then amplified. The results are consistent with previous probe measurements of the turbulent Reynolds stress, and provide a detailed confirmation of the basic theoretical expectations for the turbulent drive of zonal flows in magnetized plasmas.

ISBN: 9781124201375Subjects--Topical Terms:

1018402
Physics, Fluid and Plasma.

Study of nonlinear energy transfer between drift wave turbulence and spontaneously generated sheared flows in a laboratory plasma.
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008 130515s2010 ||||||||||||||||| ||eng d
020 $a 9781124201375
035 $a (UMI)AAI3419810
035 $a AAI3419810
040 $a UMI $c UMI
100 1 $a Xu, Min. $3 811471
245 1 0 $a Study of nonlinear energy transfer between drift wave turbulence and spontaneously generated sheared flows in a laboratory plasma.
300 $a 178 p.
500 $a Source: Dissertation Abstracts International, Volume: 71-10, Section: B, page: 6190.
500 $a Adviser: George R. Tynan.
502 $a Thesis (Ph.D.)--University of California, San Diego, 2010.
520 $a Experiments in a laboratory plasma are used to identify how small-scale turbulent structures give rise to large-scale sheared zonal flows. A new technique based on cross-bispectral analysis has been developed and applied to directly measure the nonlinear energy transfer rates between drift wave turbulence and sheared flows. In addition fast imaging is used to directly observe the turbulent structure dynamics. A combined study using both Langmiur probe arrays and fast visible light imaging shows that the sheared zonal flow is sustained by the emission of drift vortices in the central plasma which then propagate in a spiral trajectory, approach the shear layer, and then merge into the sheared flow, thereby transferring their momentum and kinetic energy to it. The shear flow is then amplified. The results are consistent with previous probe measurements of the turbulent Reynolds stress, and provide a detailed confirmation of the basic theoretical expectations for the turbulent drive of zonal flows in magnetized plasmas.
590 $a School code: 0033.
650 4 $a Physics, Fluid and Plasma. $3 1018402
690 $a 0759
710 2 $a University of California, San Diego. $b Engineering Sciences (Engineering Physics). $3 1036190
773 0 $t Dissertation Abstracts International $g 71-10B.
790 1 0 $a Tynan, George R., $e advisor
790 1 0 $a Diamond, Patrick H. $e committee member
790 1 0 $a Linden, Paul F. $e committee member
790 1 0 $a Nomura, Keiko K. $e committee member
790 1 0 $a O'Neil, Thomas M. $e committee member
790 $a 0033
791 $a Ph.D.
792 $a 2010
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3419810