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High-density ultracold neutron sources for the WWR-M and PIK reactors
Authors:A P Serebrov  A K Fomin  A G Kharitonov  V A Lyamkin  D V Prudnikov  S A Ivanov  A N Erykalov  M S Onegin  K A Gridnev
Abstract:It is proposed to equip the PIK and WWR-M research reactors at the Petersburg Nuclear Physics Institute (PNPI) with high-density ultracold neutron (UCN) sources, where UCNs will be obtained based on the effect of their accumulation in superfluid helium (due to the specific features of this quantum fluid). The maximum UCN storage time in superfluid helium is obtained at temperatures on the order of 1 K. These sources are expected to yield UCN densities of 103–104 cm–3, i.e., approximately three orders of magnitude higher than the density from existing UCN sources throughout the world. The development of highest intensity UCN sources will make PNPI an international center of fundamental UCN research.
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