Stabilization of acceleration mode and nuclear beam extraction on the JINR synchrophasotron

To provide the stability of the accelerating voltage frequency (3-5x10-5) in the modes of acceleration and extraction of a accelerated nuclei beam on the JINR synchrotron, a special system has been developed and put into operation providing the couplina of the accelerating voltage frequency with the accelerator magnetic field. The system comprises an integrator, a multiple-component attenuator controlled by means of electronic switches, a B-timer and a reversive counter. From an induction coil the voltage proportional to the rate of change of the guiding magnetic field is applied through the attenuator to the intearator input. The integrator output voltage modUlates the frequency of the master oscillator. The system allows fast and highly-accurate change of the coupling law when passing from acceleration of particles of one type to acceleration of particles of another type, and combination of slow and fast beam extractions during one cycle