dc.contributor.author Martin, Adam Kent, 1964- en_US dc.date.accessioned 2009-10-07T00:14:51Z dc.date.available 2009-10-07T00:14:51Z dc.date.issued 1997 en_US dc.identifier.other b39155493 en_US dc.identifier.other 37908216 en_US dc.identifier.other Thesis 45600 en_US dc.identifier.uri http://hdl.handle.net/1773/9717 dc.description Thesis (Ph. D.)--University of Washington, 1997 en_US dc.description.abstract The Helicity Injected Tokamak (HIT) experiment is a low aspect ratio (A = 1.5) tokamak formed and sustained by helicity injection. A critical issue facing its operation is the efficiency of the helicity injector. In order to study this, an equilibrium model of the injector has been developed which assumes that the open field-lines in the injector and the edge region are in force-free equilibrium with a uniform resistivity ($\eta).$ This resistivity may include a dynamic as well as a classical component. This model yields good agreement with measurements of edge poloidal magnetic field and injector current, with as few as one fitting parameter. This model has been extended to shots with significant amounts of closed flux. The calculated equilibria are found to be consistent with measurements of edge electron temperature using a triple Langmuir probe. The equilibria are also found to be consistent with helicity conservation to within the accuracy of the measurements. en_US dc.format.extent vii, 124 p. en_US dc.language.iso en_US en_US dc.rights Copyright is held by the individual authors. en_US dc.rights.uri en_US dc.subject.other Theses--Physics en_US dc.title An equilibrium model for helicity injector operation en_US dc.type Thesis en_US
﻿