Show/Hide Menu
Hide/Show Apps
anonymousUser
Logout
Türkçe
Türkçe
Search
Search
Login
Login
OpenMETU
OpenMETU
About
About
Açık Bilim Politikası
Açık Bilim Politikası
Frequently Asked Questions
Frequently Asked Questions
Browse
Browse
By Issue Date
By Issue Date
Authors
Authors
Titles
Titles
Subjects
Subjects
Communities & Collections
Communities & Collections
Nonlinear mode coupling and sheared flow in a rotating plasma
Date
2009-01-01
Author
Uzun Kaymak, İlker Ümit
Guzdar, P. N.
Choi, S.
Clary, M. R.
Ellis, R. F.
Hassam, A. B.
Teodorescu, C.
Metadata
Show full item record
This work is licensed under a
Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License
.
Item Usage Stats
2
views
0
downloads
Shear flow is expected to stabilize the broad spectrum of interchange modes in rotating plasmas. However, residual fluctuations may still persist. To investigate the presence of such fluctuations, sixteen magnetic pickup coils equally spaced on a crown have been mounted inside the vacuum vessel, at the edge of a rotating plasma in mirror configuration. A comprehensive analysis of the magnetic fluctuations shows that very low spatial mode numbers survive under the imposed shear flow. Nevertheless, temporal Fourier analysis reveals a broadband frequency spectrum. Clear evidence of nonlinear mode coupling is obtained using higher-order spectral analysis, namely the bispectrum and the bicoherence. Two-dimensional simulations of magnetohydrodynamic equations with gravity and imposed shear flow quantitatively model the spatio-temporal characteristics of the observed magnetic fluctuations. Copyright (C) EPLA, 2009
Subject Keywords
General Physics and Astronomy
URI
https://hdl.handle.net/11511/46412
Journal
EPL
DOI
https://doi.org/10.1209/0295-5075/85/15001
Collections
Department of Physics, Article