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.