Extraction and polarization transformation of RHIC proton beam with momentum 250 GeV/c using bent crystal

Possibilities are considered of using bent crystals at the ring high-intensity collider (RHIC) for proton beam extraction and spin orientation transformation at 250 GeV/c. The computer simulation shows that by means of the method it is possible to obtain the extraction efficiency of 10^-4 and the collider beam halo intensity of 10¹⁰ proton/s. In the case the beam of transversely polarized protons with intensity up to 10⁶ proton/s may be shaped. The conclusion is made that the extraction method discussed practically does not perturb the main beam and permits essentially compress the phase volume of extracted protons.