Accession Number : ADA267069


Title :   Determination of the Electromagnetic Fields Radiated from the ARES EMP Simulator


Descriptive Note : Technical rept. 1 Sep 91-31 Dec 92,


Corporate Author : LOGICON R AND D ASSOCIATES LOS ANGELES CA


Personal Author(s) : Tesche, Fred M ; Mo, Charles T


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a267069.pdf


Report Date : 01 Jul 1993


Pagination or Media Count : 68


Abstract : This report describes a calculational model for evaluating the electromagnetic (EM) fields produced by the ARES simulator outside its normal working volume. The model employs transmission line theory to determine the simulator current distribution. Once this is determined, the radiated fields are computed approximately using the Norton surface-wave formalism. The transient electric and magnetic fields on the ground are calculated using a fast Fourier transform (FFI) and are compared with experimental magnetic field data. Accuracies on the order of 30% in the peak fields are noted in much of the data. The fields in the air above the earth also have been calculated, and the relative importance of the Norton surface wave in the overall solution has been clarified. This model and its resulting PC code provide a useful tool for further studies of the impact of radiated EM fields on distant electrical systems. The results presented here are directly applicable in defining and evaluating the EM environments produced by ARES, or by similar bounded wave simulators, and in assessing and limiting the possible biological effects of pulsed radiation.... EMP Fields, EMP Simulator


Descriptors :   *ELECTROMAGNETIC FIELDS , *ELECTROMAGNETIC PULSES , SIMULATORS , RADIATION , SURFACE WAVES , DISTRIBUTION , THEORY , ELECTROMAGNETIC ENVIRONMENTS , FAST FOURIER TRANSFORMS , TRANSMISSION LINES , AIR , MODELS , COMPUTATIONS , TRANSIENTS


Subject Categories : Electricity and Magnetism
      Electromagnetic Pulses


Distribution Statement : APPROVED FOR PUBLIC RELEASE