Sampling resistor’s response of Rogowski coil to ns-grade high pulse current

A kind of self-integrated Rogowski coil is designed. Through circuit theory and simulation analyses, the impacts on the measured signal, which are caused by the sampling resistor’s residual inductance and the coil’s ground capacitance, have been studied. By shunt-wound method, we have made and calibrated a low-inductance sampling resistor. In the calibration and measure experiments, oscillation and deformation of the measured signal were eliminated resistor. And the theoretical analyses are supported by the experiments. The Rogowski coil’s responding time to square pulse signal is 11 ns, and its sensitivity is 4.25 mV/A. For its good stability, we use the coil to measure the current of the diode of the long-pulsed intense electron beam accelerator and get the current waveform with flat-