Self-integral capacitance divider used for voltage measurement along magnetically insulated transmission lines

A self-integral capacitance divider used for voltage measurement along the magnetically insulated transmission line was developed. By using the commercial PSpice software, the equivalent circuit model, transfer-equations and frequency responses of the divider were obtained. The calculation results show that signals with frequency more than 5 MHz can be perfectly measured by the divider. Based on the test stand of the Qiangguang-Ⅰ coaxial magnetically insulated transmission line (MITL) with 1 m length and 2 cm AK gap, the working characteristics of the divider was tested. Experimental results show that with little electron reached the anode surface, the divider developed above can be perfectly used for the measurement of the voltage pulse along the MITL (with peak voltage 600 kV, risetime 80 ns).