High-altitude electromagnetic pulse (HEMP) simulators, consisting of fast risetime pulsed drivers and large antennas, are utilized to produce intense transient electromagnetic environments in a large test volume greater than tens of meters. Key parameters of the electric fields of concern are limited in some special ranges, including pulse risetime of a few nanoseconds, full widths at half maximum of tens of nanoseconds, and peak intensities greater than 50 kV/m. These simulators can be used to test and evaluate the hardening performances of full-scale military equipment, such as large ground vehicles, aircraft, and ships. Globally, researchers target a fast risetime of 1-2 ns, high peak strength of 70-100 kV/m, and large test volume in the range of 30-300 m. Recently, both single-side and two-side driven fast pulsers were developed, with peak output voltages of 3 and 5 MV, respectively. New pulsers with improved antennas can help obtain a test volume greater than 70 m. However, it is a challenge to further improve the output voltage of single-side driven fast pulsers to more than 10 MV. Chinese researchers have developed several large HEMP simulators, with output voltages of single-side-driven fast pulsers greater than 3 MV. Given this background, the present study reviews the progress at Northwest Institute of Nuclear Technology and other research institutions, with respect to designs of critical components, such as compact primary high-voltage pulsers, pulsed megavolt capacitors with multilayer films, low-jitter gas switches, and large radiating antennas.
更多
原文链接
分享
引用
