Title

Two-dimensional time-dependent magneto-hydrodynamic simulations of accelerating arc plasmas

Date of Award

1991

Availability

Article

Degree Name

Doctor of Philosophy (Ph.D.)

Department

Physics

First Committee Member

Manuel A. Huerta, Committee Chair

Abstract

This thesis is an investigation of the internal dynamics of accelerated arc plasmas including instabilities of the Kruskal-Schwarzchild type. The accelerated arc plasmas are in the regime of plasma armatures typical in electromagnetic rail launchers with current densities of the order of 10$\sp8$ amps/meter$\sp2$, accelerations of the order of 10$\sp7$ meters/sec$\sp2$ and temperatures of the order of 10$\sp4$Kelvin. A numerical 2 dimensional MHD model is used to study the plasma armature in contact with a near vacuum magnetic field. The nonlinear bubble, spike and other surface deformations are followed using a hybrid flux corrected transport (FCT) code. A description of the resulting disruption of the main plasma arc is sought. This disruption together with rail ablation can lead to secondary arcs and other loss mechanisms.

Keywords

Physics, Fluid and Plasma

Link to Full Text

http://access.library.miami.edu/login?url=http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:9201116