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The study of near--threshold meson production in pp and pd collisionsinvolving polarized beams and polarized targets offers the rare opportunity togain insight into short--range features of the nucleon--nucleon interaction.The Cooler Synchrotron COSY at FZ--J\"ulich is a unique environment to performsuch studies. Measurements of polarization observables require a cylindricallysymmetrical detector, capable to measure the momenta and the directions ofoutgoing charged hadrons. The wide energy range of COSY leads to momenta ofoutgoing protons to be detected in a single meson production reaction between300 and 2500 MeV/c. Scattering angles of protons to be covered extend to about$45^{\circ}$ in the laboratory system. An azimuthal angular coverage of thedevice around 98% seems technically achievable. The required magneticspectrometer could consist of a superconducting toroid, providing fields around3 T.Comment: 6 pages, 1 figure, submitted to Czechoslovak Journal of Physic

Heavy meson production in NN collisions with polarized beam and target—A new facility for COSY