Modelling of electromagnetic interferences produced by a railgun

The electromagnetic fields radiated by a railgun during its operation are evaluated at different points around the launcher. The radiation is determined, assuming a temporal and spatial form of the current in the plasma arc, and integrating the Maxwell equations directly in the time domain. In general the evaluation of the electromagnetic field expressions requires a numerical integration, while when it is possible to assume particular spatial and temporal form of the arc current, analytical expressions are derived. The results show that unacceptable electromagnetic disturbances can be produced during the arc ignition of a railgun.<
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