FUNSPIN polarized cold-neutron beam at PSI

Properties of the cold-neutron beam at the FUNSPIN facility of the SINQ neutron source of the Paul Scherrer Institute, Villigen, Switzerland were investigated. The measured flux density Φ=(2.46±0.04)×108[cm2smA]-1, the wavelength averaged mean polarization around the beam axis PA=(95.29±0.04)% and the mean polarization over the full beam cross-section P=[89.75±0.01(stat)±1.0(syst)]% are the main attributes of this powerful facility for fundamental particle physics experiments with slow neutrons.