Device for automatic control of the magnetic field of a cyclic accelerator

The purpose of the invention is to improve accuracy of control of the energy and intensity of accelerated particles in cyclic accelerator with the aid of the automatic controller (AC) of the accelerator magnetic field. AC comprises stabilized current sources for permanent magnetization of the electromagnet winding and for compensation of the active losses in the resonant circuit, master units, and magnetic field derivative transducer. The d.c. and a.c. current in the resonant circuit of AC is regulated by the signals depending on the magnitude of the permanent component and the variable component amplitude of the total field. The signals are supplied by a single transducer. AC provides for improving accuracy of control of the magnetic field parameters, control of the maximum magnitude and derivative of the field during injection. Besides, the system provides for precluding the effect of instability of the circuit resonant frequency and simplifying the variation of the accelerator operation