Measurement of radial beam current by double Rogowski coils

Rogowski coil is used quite widely in measuring pulse current for its simple structure and good response in high frequency. In this paper，principle of using two self-integral Rogowski coils for radial electronic beam current measurement is analysed, and the Rogowski coils are calibrated by standard current. The calibrated results show that the diagnostic system could get the signal with response time less than 10ns and error about 4.7% when the rising edge of the standard current is 30ns and the system can meet the requirements of nanosecond beam measurement. Therefore, it can be used for measuring the intensity of a radial electronic beam eradiated by high-power microwave devices．