Abstract

An internal polarized gas target in conjunction with a beam of polarized protons stored in the IUCF Cooler storage ring has been used to measure analyzing power and spin correlation parameters between 200 MeV and 450 MeV over a wide range of angles. A consistent absolute beam and target polarization calibration was established by ramping the stored protons up and down in energy. The analyzing power Ay and the spin correlations Axx, Ayy and Axz were measured with transverse beam polarization, while determination of Azz required the development of a longitudinally polarized beam. First experiments on the spin dependence on π0-production have recently been carried out.

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