title: Investigation of a high power electromagnetic pulse source.
abstract: A high power electromagnetic pulse source with a resonant antenna driven by a compact power supply was investigated in this paper. To match the impedance of the resonant antenna and initial power source, a compact power conditioning circuit based on electro exploding opening switch (EEOS) and pulsed transformer was adopted. In the preliminary experiments, an impulse capacitor was used to drive the system. With the opening of the EEOS at the current of 15 kA flowing trough the primary of the transformer, the resonant antenna was rapidly charged to about -370 kV within a time of about 100 ns. When the switch in the resonant antenna closed at the charging voltage of about -202 kV, the peak intensity of the detected electric field at a distance of about 10 m from the center of the source was 7.2 kV∕m. The corresponding peak power of the radiated electromagnetic field reached 76 MW, while the total radiated electromagnetic energy was about 0.65 J. The total energy efficiency of the resonant antenna was about 22% which can be improved by increasing the closing rapidity of the switch in the antenna.
authors.affiliation: College of Photoelectrical Science and Engineering, National University of Defense Technology, Hunan 410073, People's Republic of China.
authors.forename: Yuwei
authors.initials: Y
authors.lastname: Wang
authors.forename: Dongqun
authors.initials: D
authors.lastname: Chen
authors.forename: Jiande
authors.initials: J
authors.lastname: Zhang
authors.forename: Shengguang
authors.initials: S
authors.lastname: Cao
authors.forename: Da
authors.initials: D
authors.lastname: Li
authors.forename: Chebo
authors.initials: C
authors.lastname: Liu