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Bulletin of the American Physical Society

Depolarization per bounce of ultracold neutrons in collision with material guides within varying ambient magnetic holding fields

Damien DeArmitt, Sanjay Chakrabarty, A. T. Holley

Published Oct 26, 2017• 0 citations
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Further improvement in the accuracy of any neutron lifetime experiment by means of ultracold neutrons (UCN) in material bottles is limited due to unavoidable systematic effects when the UCN are reflected from the walls. However, such effects can be excluded in principle if magnetic trapping of UCN is used. The storage of UCN in a small magnetic trap made of permanent magnets was demonstrated for the first time ever. The measured storage time in this feasibility study was (882 ± 16) s. At this level of accuracy no depolarization was observed.