A 0° facility in the cosy ring

A 0° facility is being developed for the study of meson production in proton‐nucleus collisions and other investigations at intermediate bombarding energies at an internal target position (TP2) of COSY. A set of three laminated magnets will provide a closed orbit bump for the proton beam and deflection as well as momentum analysis for ejectiles with p0/30= p=p0/2 (p0=projectile momentum). this facility will enable the spectroscopy of rare ejectiles like K+ mesons with a momentum resolution of =1%. It also allows studies of ejectiles emitted under 180° like protons from deuteron breakup.