COSY-11: an experimental facility for studying meson production in free   and quasi-free nucleon-nucleon collisions
  The COSY-11 experimental setup is an internal facility installed at the COoler SYnchrotron COSY in Juelich. It allows to investigate meson production in free and quasi-free nucleon-nucleon collisions, eg. pp --> pp meson and pd --> p_sp np meson reactions. Drift chambers and scintillators permit to measure outgoing protons, separated in magnetic field of COSY-11 dipole. Neutrons are registered in the neutron modular detector installed downstream the beam. Recently, the experimental setup has been extended with spectator detector, deuteron drift chamber and polarization monitoring system, and since then meson production can be investigated also as a function of spin and isospin of colliding nucleons. 
P. Klaja, H.-H. Adam, A. Budzanowski, R. Czyzykiewicz, D. Grzonka, M.   Janusz, L. Jarczyk, B. Kamys, A. Khoukaz, K. Kilian,...