Observations and Simulations of Magnetic Fluctuations in MCX

Recently magnetic fluctuations in the Maryland centrifugal experiment (MCX) have been measured by an azimuthal array of 16 probes in the edge region of the plasma. A detailed analysis indicates that there is primarily a convection of m  = 2 fluctuations by the azimuthally rotating plasma. However, t...

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Bibliographic Details
Published in:Journal of fusion energy 2009-09, Vol.28 (3), p.243-245
Main Authors: Uzun-Kaymak, I. U., Guzdar, P. N., Ellis, R. F., Hassam, A. B., Teodorescu, C.
Format: Article
Language:English
Subjects:
Applied sciences
Bicoherence analysis
Controled nuclear fusion plants
Dynamic stability
Electrons
Energy
Energy Systems
Energy. Thermal use of fuels
Exact sciences and technology
Fourier transforms
Frequency spectrum
Installations for energy generation and conversion: thermal and electrical energy
Magnetic probes
Magnetic variations
Nuclear Energy
Nuclear Fusion
Original Paper
Physics
Physics and Astronomy
Plasma
Plasma Physics
Rotating plasmas
Simulation
Sustainable Development
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Summary:Recently magnetic fluctuations in the Maryland centrifugal experiment (MCX) have been measured by an azimuthal array of 16 probes in the edge region of the plasma. A detailed analysis indicates that there is primarily a convection of m  = 2 fluctuations by the azimuthally rotating plasma. However, the frequency spectrum of this mode is broad and is almost of the same order as the frequency. Furthermore, bicoherence analysis indicates dominant nonlinear interaction between m  = 2 and a low frequency m  = 0 mode. We utilize a 2D MHD code to investigate the dynamics of the primary interchange instability. For very low sheared rotation there is a broad spectrum (in m ) of unstable modes. However, as the sheared rotation is increased the high mode numbers become stabilized. We will present detailed comparisons of spatio-temporal dynamics of our simulations with the data from the magnetic probes.
ISSN:0164-0313
1572-9591
DOI:10.1007/s10894-009-9201-6