2001/09/05 by K. Kirch, Klaus Kirch, Kirch, Klaus
Physics and Astronomy · #Atomic and Subatomic Physics Research #FOS: Physical sciences #Nuclear Experiment (nucl-ex) #Nuclear Physics and Applications #Quantum, superfluid, helium dynamics #nucl-ex
paper · pdf · doi:10.48550/arxiv.nucl-ex/0109002
13 pages, including 2 tables and 1 figure. Submitted to NIM A
arxiv created 2001/09/05 · openalex publication_date 2001/09/05 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Proposals exist and efforts are under way to construct pulsed spallation ultra-cold neutron (UCN) sources at accelerator laboratories around the world. At the Paul Scherrer Institut (PSI), Switzerland, and at the Los Alamos National Laboratory (LANL), U.S.A., it is planned to use solid deuterium (SD2) for the UCN production from cold neutrons. The philosophies about how the cold neutrons are obtained are quite different, though. The present proposal describes a third approach which applies a temperature optimized graphite moderator in combination with the SD2 and qualitatively combines advantages of the different schemes. The scheme described here allows to build a powerful UCN source. Assuming a pulsed 2 mA, 590 MeV proton beam with an average current of 10 microA, one obtains UCN densities in excess of 2000 cm-3, UCN fluxes of about 106 cm-2 s-1, and total numbers of UCN in excess of 2*109 every 800 s.