A new method of UCN production using a spatially alternating magnetic field with spin flips

Details A new method of UCN production using a spatially alternating magnetic field with spin flips A new method of UCN production using a spatially alternating magnetic field with spin flips

Jun 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001aipc..570..877s&link_type=abstract

The fourteenth international spin physics symposium, SPIN2000. AIP Conference Proceedings, Volume 570, pp. 877-877 (2001).

Physics

Neutron Sources

Scientific paper

Neutrons with energies E below the Fermi effective potential Ueff~0.2 μeV are called ultracold neutrons (UCN), which are totally reflected from a surface of material and thus can be stored in a bottle. The UCN in a bottle are of a great advantage for high-precision measurements in fundamental physics with neutrons, where the UCN density ρUCN takes the key role. We have proposed a new method for the production of UCN, which is based on the repeated application of a field-gradient force on a magnetic moment realized with a spatially alternating field and the correlated spin flips. To evaluate the feasibility and performance of the method, a computer simulation of neutron decelerating and transporting processes has been performed. The result indicates that the UCN density ρUCN in a storage bottle in the present method reaches quite large values as ρUCN~2.2×103 n/cm3 in a realistic condition. An experiment to test the principle and to explore the technical ingredients of the present method is being conducted using the UCN beam from the supermirror turbine at KUR. .

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