Abstract
There are some suitable methods for the measurement of ultrashort solitary electromagnetic pulses (EMP) that are generated by high-power microwave generators. The characteristics of EMPs are high-power level (Pmax = 250 MW) and very short-time duration (tp euro (1, 60) ns). Special requirements for measurement methods have to be considered because of the specific EMPs properties. In this paper, two suitable methods for this application are presented. The first one, the calorimetric method, utilizes the thermal impacts of microwave absorption. The second method presented-the magnetooptic (MO) method-uses the Faraday's MO effect as a sensor principle. A combined calorimetric sensor was realized and there were some experimental EMP measurements made with good results. The sensor utilizing the MO method is still in development.
Highlights
IntroductionShows the basic principle of microwave pulsed power generator
Fig. 1. shows the basic principle of microwave pulsed power generator
After transformation to the high voltage and pulse shaping, the pulse is fed to the microwave pulsed power generator
Summary
Shows the basic principle of microwave pulsed power generator. After transformation to the high voltage and pulse shaping (not shown in Fig. 1), the pulse is fed to the microwave pulsed power generator. The peak level of current pulse achieves the value of Ip = 100 kA with the pulse duration td = 70 μs typically in the second stage. After high voltage transformation and using pulse shaping element we can get a voltage pulse with the peak value Up = 400 kV and with the rise time tr = 0.1 ns.
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