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Three-dimensional magnetohydrodynamic simulations of field error effects in ZT-H and ZT-40 reversed-field pinch devices

Journal Article · · Fusion Technol.; (United States)
OSTI ID:5819116
Magnetic perturbations caused by field errors may pose a threat to magnetic confinement. They can cause the formation of magnetic islands, which may increase transport. The response of a reversed-field pinch (RFP) plasma to field errors has been calculated numerically. A three-dimensional nonlinear magneto-hydrodynamic code was used, with field errors specified as boundary conditions. Two types of field errors were studied: those arising from current flowing in the toroidal field coil set and those arising from induced currents in the conducting shell flowing around holes. Design data from two RFPs at the Los Alamos National Laboratory - ZT-40 (currently operating) and ZT-H (being designed) - were used. Results on the effect of the plasma on the radial field perturbation and on island size are given. The effects of the chosen equilibrium current profile resistivity, and viscosity are discussed.
Research Organization:
9512470
OSTI ID:
5819116
Journal Information:
Fusion Technol.; (United States), Journal Name: Fusion Technol.; (United States) Vol. 15:1; ISSN FUSTE
Country of Publication:
United States
Language:
English