Approach of reducing pulse duration of compact two-stage helical EMGs

An approach to reducing the pulse duration of the compact two-stage helical explosive magnetic generators (EMGs) is to increase the conical angle of the helical coil in the second stage, but it will result in quick effective inductance decrease of the second stage inner coil. To find the optimal conical angle, three configurations were designed and tested, which have the same first stage but different half-conical angles for the second stage, i.e., 6°，8°，10°, respectively. Experimental results show that the currents on the inductive loads are 140 kA, 90 kA, 50 kA with the pulse durations 12.5 μs, 8.5 μs, 6.3 μs respectively for the three configurations.