Exploding metallic foils and fuses: a computational modeling update

Compact and Integrated High-Power Pulse Generation and Forming System

“…This electro-explosive disintegration is caused by a rapid increase of the fusible elements thermal energy to a value comparable to the metal sublimation energy [14,43,64]. The rate of increase in resistance dR/dt during the FF disintegration reaches many hundreds of Ω/µs [39,51]. Due to the multiplication of the number of parallel fusible elements, FF have the ability to conduct a considerable value of currents, in the order of hundreds of kA.…”

“…In typical FF solutions, the times of current limiting to zero reach hundreds of ns [24,31,44], depending on the limiting current value and the forming coil inductance. Typical designs are usually based on parallel connection of many thin wires [45][46][47][48] or foil strips [49][50][51], most often made of metals with high conductivity (e.g., silver, copper) [43,47,[52][53][54][55] or with high specific melting energy (e.g., tungsten) [43,56,57], called fusible elements.…”

Global problems and energy

“…Because the OS foil model was obtained from experiments that did not involve stage switching, small differences also exist between measured and predicted variations for the OS voltage after switching given in figure 5. This is not altogether unexpected with the quite simple model that was used and far more complex models based on atomic data [12] have needed an adjustment parameter [13] to ensure a good fit between the experimental and measured characteristics. It should be noted that no such parameters were used anywhere in the numerical code giving the computed results of figures 3-5.…”