A set of fluid equations is derived to describe the interaction of a very strong electromagnetic pulse with a weakly ionized plasma. These equations are used to investigate the dynamic behavior of an intense electromagnetic pulse propagating through the atmosphere. Results show that the amount of energy transmitted through the medium depends very strongly on the initial energy of the pulse and such characteristics and its frequency, its shape, and its length. In addition, a pulse was propagated through an air filled waveguide to verify the acuracy of the theoretical model. The theory also predicts very accurately the pulse breakdown threshold.

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The University of Texas at Austin as an account of work sponsored by the Lawrence Livermore Laboratory (LLL) under subcontract No. 1823209. Neither LLL, members of LLL, The University of Texas, nor any persons acting on behalf of either: (a) makes any warranty or representation, express or implied, with respect to the accuracy, completeness, or usefulness of the information contained in this report, or that the use of any information, apparatus, method or process disclosed in this report may not infringe privately owned rights; or (b) assumes any liabilities with respect to the use of, or for damages resulting from the use of, any information, apparatus, method, or process disclosed in this report. ABSTRACT A preliminary engineering design of a compensated pulsed alternator for driving laser flashlanps is presented. The work performed by the Center for Electromechanics at The University of Texas at Austin also includes the optimization and revision of the prototype design for a compensated pulsed alternator power supply for the NOVA laser system at Lawrence Livermore Laboratory, BIRD UT-CEM LLL 11-30-78 96 15mm x M2cr