Nuclear Electromagnetic Pulse Simulation by Point Source Injection Techniques for Shielded and Unshielded Penetrations
HARRY DIAMOND LABS ADELPHI MD
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Nuclear electromagnetic pulse simulation by point source injection techniques were investigated for shielded and unshielded system penetrations. Circuit theory is applied to the unshielded case and a generalized injection system is suggested. To determine the relationship between point source current injection on the external shield of a cable and its response to free-field EMP excitation, general transmission line solutions were obtained in the frequency domain for each case. A numerical transform was used to obtain time domain waveforms of the external and internal currents. Both solutions were verified with experimental data collected on a braided shield coaxial cable that exhibited both types of reactive coupling inductive and capacitive through its shield. Shielding effectiveness transfer functions were experimentally obtained with a coaxial cable driver to determine the shield parameters.
- Nuclear Weapons