Ultracold neutron facility
The instrument zone
PF2 is an ultracold neutron (UCN) source consisting of a straight then curved vertical neutron guide which selects very cold neutrons (VCN) with a speed of only 60 m/s. Then, these neutrons enter a "neutron turbine" and hit blades rotating with a receding speed of about 25 m/s. This transforms neutrons into UCNs with a velocity range from 0 to 15 m/s.
The VCNs and UCNs produced by PF2 are distributed to a series of experiments.