On the use of ondulators with variable parameters in beam monitoring systems of proton synchrotrons

Possibility of using ondulator radiation with variable parameters for monitoring beams in proton synchrotrons is considered. Law is obtained of magnetic field spatial distribution at which charged particles when flying through the field, at energies exceeding some threshold one emit in the given direction at the given wavelength the radiation of intensity, independent of particle energy. It is shown that the minimum value of magnetic field quasiperiod is determined by the size of synchrotron operation region and equals approximately 1 cm. Therefore the boundary frequency of magnetic field spectrum equals about approximately 1010 Hz. The energy of protons must equal to γ approximately equal to 100 in order to obtain the visible radiation