Simple, Noninvasive and Wide-Band Current and Voltage Sensors for Use with Coaxial Cables

Summary form only given. There is a frequent demand for easily fitted probes for the accurate and non-invasive measuring of fast rising currents and voltages being transmitted via coaxial cables. Using designs basically similar to those already in use with high power water lines, capacitively-coupled voltage and inductively-coupled current transducers have been developed at Loughborough University with rise times between 1 and 2 ns and being suitable for use with both 50 W coaxial cable, where relatively low voltages (up to a few kV) and currents are transmitted, and high-power coaxial cable, where both the voltages (up to 150 kV) and currents are correspondingly' larger. Due to their simple and low cost construction, the probes are expendable, and they could be extremely valuable for use in a range of single-shot explosively-driven experiments. The paper will present constructional details of the probes, together with the results of calibration tests.