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Prediction of Magnetic Fields, Eddy Currents, and Loads in a Tokamak During a Disruption for Alcator C-Mod's Advanced Outer Divertor

J. Doody[1], B. Lipschultz[2], R. Granetz[1], W. Beck[1], L. Zhou[1], J. Irby[1]
[1]Massachusetts Institute of Technology, Plasma Science and Fusion Center, Cambridge, MA, USA
[2]York Plasma Institute, University of York, Heslington, York, UK
Published in 2014

COMSOL Multiphysics® has been used to predict the magnetic fields, eddy current, lorenz forces and stresses during a disruption for the new Advanced Outer Divertor for the Alcator C-Mod tokamak. A tokamak is used to study magnetic confinement of plasma for fusion, and a disruption occurs when the plasma decays, rapidly losing all of its current. COMSOL has been used to recreate the fields generated both by the plasma and coils during a disruption to match an actual discharge on Alcator C-Mod and thus the currents and forces induced in the new Advanced Outer Divertor.

COMSOL's ability to match field measurements from a real discharge, as well as re-create the spatially and time varying fields in C-Mod allow us to more accurately predict the loads and stresses the divertor needs to be designed for and modify the design to reflect these requirements.

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