EED ignition in relation to radar peak and average power - Poster -
conference paper
Safe separation distances between transmitters and Electro-Explosive Devices (EEDs) are dependent on the ignition characteristics of the EED and the signal shape of the time-dependent electromagnetic field near the EED. For radars the question was raised whether peak power or average power is the governing parameter for the determination of the safe separation distance, and if so whether the type of EED is relevant to a distinction between peak and average power. Here the influence of the duty cycle and pulse repetition frequency of a pulsed radar on the Ohmic heating of the active element of the EED are studied through numerical and analytical solution. The analysis comprises both infinite pulse trains and also finite pulse trains, the latter being relevant for illumination of a munition by a radar sweep. Depending on the EED thermal time constant the temperature increase of the active EED element due to a single pulse is damped out before the next pulse arrives or there is an additive effect of individual pulses leading to a typical saw tooth pattern on top of a gradual temperature increase. Overall this will lead to a distinction between peak and average power describing the EED ignition susceptibility of various igniter types comprising electric bridge wire, conducting composition, exploding foil initiator and exploding bridge wire EEDs.
TNO Identifier
1015284
Source title
Artificial Intelligence, Machine Learning and Data Science in Energetic Materials Research. 54th International Annual Conference of the Fraunhofer ICT combined with Symposium "Advances in Metal Fuels and Reactive Mateterials Science and Technology", Karlsruhe, Germany, 24-27 June 2025
Collation
8 p.
Pages
Poster P19
Files
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