Measurements of Line-tied Kink Eigenfunction in the Rotating Wall Machine and Comparison to Simulation

Details Measurements of Line-tied Kink Eigenfunction in the Rotating Wall Machine and Comparison to Simulation Measurements of Line-tied Kink Eigenfunction in the Rotating Wall Machine and Comparison to Simulation

Dec 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010agufmsm51c1844b&link_type=abstract

American Geophysical Union, Fall Meeting 2010, abstract #SM51C-1844

Astronomy and Astrophysics

Astrophysics

[7519] Solar Physics, Astrophysics, And Astronomy / Flares, [7526] Solar Physics, Astrophysics, And Astronomy / Magnetic Reconnection

Scientific paper

Much work in the theory of solar flares has focused on the internal kink instability in the line-tied cylinder. This instability in the Rotating Wall Machine has an ideal character, but also exhibits reconnection events that periodically flatten the current profile and change the magnetic topology. The finite length of the device gives the mode an inherently 3D character. A scanning, 3-axis magnetic probe has been used to measure the internal equilibrium and fluctuating magnetic fields. Using shot-to-shot averaging, 2D profiles (R,Z) of the plasma can be measured via an an axially scanning traverse. Internal mode structure has been determined through multiple-shot correlation analysis. The line-tying conditions in the machine are examined through the structure of the magnetic field. Finally, using equilibrium measurements of n_e, T_e, and J as inputs, the line-tied kink mode has been studied numerically using the NIMROD code. Linear and nonlinear simulation results are presented and compared to experiment.

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