Abstract Details
Abstracts
Author: Yuchen Lin
Requested Type: Poster
Submitted: 2026-03-13 14:23:21
Co-authors: R. Fitzpatrick
Contact Info:
University of Texas at Austin
MAI, 110 Inner Campus Drive
Austin, TX 78712
United States
Abstract Text:
Asymptotic matching techniques are used to investigate the drift-magnetohydrodynamical response of a flowing tokamak plasma to a static, resonant magnetic perturbation that is switched on suddenly in time.
Seven different resonant plasma response regimes are identified.
Expressions for critical layer quantities in each regime are derived.
The driven reconnected magnetic
flux at the rational surface is expressed as a contour integral in the space of the complex Laplace transform variable conjugate to time.
In each resonant response regime, the integral is evaluated to give a closed-form analytic expression for the driven magnetic flux as a function of time.
Depending on the values of the normalized parameters that govern the resonant layer, seven different reconnection scenarios are identified that describe how the
driven reconnected magnetic flux at the rational surface evolves through the various different resonant response regimes as a function of time.
The driven reconnected magnetic flux at the rational surface is calculated as a function of time using two alternative methods. The first solution method, which is exact, involves numerical
evaluation of the aforementioned contour integral. The second solution method, which is only approximate but much less time consuming, involves evaluating the closed-form analytic expressions.
The results of the two
solution methods are compared.
Characterization: 1.0
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