The design, main design formulas, and test results of a small-size differential high-voltage divider are presented. The conditions determining correctness of using the divider for measuring nanosecond high-voltage signals are obtained. It is shown that the differential voltage divider has some limitations in low- and high-frequency regions. Experiments have been performed on a TCyrillic small letter EY-500 pulsed electron accelerator with the following characteristics: the accelerating voltage is 350-450 kV, the base pulse duration is 100 ns, the rise time is <5 ns, and the complete pulse electron energy is up to 250 J. The pulse repetition rate is 1-3 pulses/s. To restore the shape of the measured voltage, it is necessary that the output signal from the voltage divider be integrated. The measurement error does not exceed ±10%.
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