Estimation of radiation loadings during slow extraction of relativistic nuclei from a nuclotron

Calculation results of radiation doses due to nuclei losses in the system of beam slow extraction and Nuclotron superperiod, have been presented for the first time. It was assumed, that the particles extracted can interact only with electrostatic septum, which is tungsten foil 0.3 mm thick and 3 m long. Admissible intensities of Nuclotron beam for pulse duration of 10-3 and is due to overheating of dipole superconducting coil, are presented. In the range of the maximum value the dose in the dipole is mainly formed at the expense of beam nuclei, which have escaped from the septum due to Coulomb scattering. The calculations have shown that technological protection of the dipole coils is effective only for heavy nuclei at low energies due to comparatively wide (10 - 100) mrad angle of particle impinge