Bulletin of the American Physical Society
2005 47th Annual Meeting of the Division of Plasma Physics
Monday–Friday, October 24–28, 2005; Denver, Colorado
Session KP1: Poster Session V
Wednesday, October 26, 2005
Adam's Mark Hotel Room: Grand Ballroom I & II 9:30am
Abstract ID: BAPS.2005.DPP.KP1.128
Abstract: KP1.00128 : Approach to Magnetic Self-excitation in the Madison Dynamo Experiment
Preview Abstract Abstract
(University of Wisconsin-Madison)
The Madison Dynamo Experiment is a 1 m diameter spherical vessel filled with flowing liquid sodium, used to study magnetic field generation and magnetohydrodynamic (MHD) turbulence. The approach to magnetic self-excitation is studied by applying magnetic fields of different polarizations and frequencies to the flowing fluid; internal and external probes measure the induced magnetic field. The induced field is used to determine the profiles of the fluid's mean velocity field through an inversion process. The resulting electromagnetic model of the system provides both the magnetic Reynolds number, $R_m$, and the magnetic growth rate. Variation in the geometry and speed of the fluid as a function of $R_m$ (for $0 < R_m < 110$) is presented, as well as an estimate of the critical $R_m$ required for self-excitation as computed from an eigenmode analysis.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2005.DPP.KP1.128
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