Performance of Hall sensor-based devices for magnetic field diagnosis at fusion reactors

In the paper, we report the results on the development of Hall sensor-based devices possessing the functions of selfdiagnostics and automatic correction, which are aimed at the improvement of the magnetic field measuring accuracy in radiation environment of thermonuclear reactors. Developed devices are based on radiation-hard semiconductor sensors. The method for device stabilization is offered, which is based on a test method of measurements, where sensor and actuator are combined in a single primary transducer. New algorithm of correction of the transduction function on the basis of frequency separation of differential and integral signal components is proposed. The results of the testing of developed Hall sensor-based devices, applied for the magnetic field measurement at the largest European thermonuclear reactors TORE SUPRA (France) and JET (Great Britain), are presented.