Wide-range inductive sensors of currents with nanosecond rise times for measuring parameters of high-current pulses (Review)

摘要

The design and characteristics of inductive current sensors (modernized Rogovski coils) and inductive sensors on their basis (in the form of a part of a tore) with shielded coils for measuring the parameters of pulse currents in conductors with diameters of up to 1.7 m and electron beam currents of 10-2000 kA with durations of 10-100 ns in a self-integration mode. The Rogovski coils and sensors have current rise times of nanosecond duration and improved noise immunity and mechanical strength. Methods for the calibration of Rogovski coils for determining their transient response and amplitude sensitivity are presented. Specific features of the certification of large-diameter devices are pointed out, and a new method for certifying such sensors is expounded. The sensors are used in experimental investigations and the refinement of units of high-current linear induction accelerators as well is in the starting and adjustment work with a high-power LIA-30 electron accelerator with water-insulated radial lines in the inductors of accelerating modules and for monitoring its parameters (40MeV, 100 kA, 20 ns). Such sensors are applicable for recording pulse current characteristics in other electrophysical facilities.