2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/105327Two possible options of polarized proton-antiproton collider at the future HESR storage ring are considered. It is shown that the modifications of the present HESR project which are needed to arrange for the polarized proton-antiproton collisions are relatively moderate. An achievable luminosity of 5x10^31 cm^-2 sec^-1 will provide a possibility to carry out experiments in the CM energy range 10-30 GeV, a particularly interesting option for Drell-Yan physics.26 pages, 23 figures, new version with some correction to the original textAccelerator PhysicsInstrumentation and Detectorstext