Toward polarized antiprotons : Machine development for spin-filtering experiments

In 2011 the Polarized AntiprotoneXperiments Collaboration has performed a successful spin-filtering test using protons at MeV at the COSY ring in J?lich, which allowed the determination of the spin-dependent polarizing cross section, that compares well with the theoretical prediction from the nucleon?nucleon potential and it confirms that spin filtering can be adopted as a method to polarize a stored beam. The document concentrates on the commissioning of the experimental equipment and the machine studies conducted to achieve the required beam lifetimes of s in the presence of a dense polarized hydrogen storagecell target of areal density . The developed techniques can be directly applied to antiprotonmachines and allow for the determination of the spin-dependent cross sections via spin filtering.