Two variants of injection of heavy ions into the Nuclotron booster

The acceleration of uranium ions with the charge Z = 32 and atomic mass A = 238 is discussed. In the first section of the spiral waveguide working at the frequency f1 = 10 MHz with the RF power P = 3 MW, ions are accelerated from Wi = 11.25 keV/nucleon to Wi1 = 500 keV/nucleon on the length L1 = 2.5 m. The magnetic field focusing ions is B1 = 1.5 T. The second section working at the frequency f2 = 150 MHz has the length L2 = 12.5 m. The focusing magnetic field is B2 = 2 T. The final energy of ions is Wi2 = 5.6 MeV/nucleon. The acceleration of ions in coaxial resonators begins from the energy Wi = 84 keV/nucleon to Wi1 = 500 keV/nucleon on the length L1 = 3.6 m after crossing 30 resonators. The RF power of each resonator is P = 50 kW, frequency f2 = 150 MHz, high voltage on each gap E1 = 100 kV/cm. Focusing of the ion beam is realized by quadrupole magnetic lenses between the resonators. The gradient of the magnetic field is G = 4.8 kGs/cm. The final energy of the accelerated ions Wi2 = 5 MeV/nucleon is achieved in the H-resonator, which has the length L2 = 17 m, high voltage on each gap E1 = 250kV/cm, frequency f2 = 150 MHz. Focusing of the ion beam is realized by quadrupole magnetic lenses inside the drift tube, the gradient magnetic field is G = 7.25 kGs/cm