Polarizing a stored, cooled proton beam by spin-dependent interaction with a polarized hydrogen gas target

We report experimental results of a stored proton beam polarized by sp dependent attenuation through a high density polarized hydrogen target. The experiment was carried out at the Heidelberg low energy Test Storage Ring. The polarized hydrogen storage cell gas target consisted of polarized hydrogen atoms produced by the Heidelberg atomic beam source injected into a thin walled, cylindrical aluminum tube. (AIP) copyright 1996 American Institute of Physics. copyright 1995 American Institute of Physics