{"paper":{"title":"Storage of ultracold neutrons in the UCN$\\tau$ magneto-gravitational trap","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["nucl-ex"],"primary_cat":"physics.ins-det","authors_text":"A.R. Young, A. Saunders, A.T. Holley, B.A. Slaughter, B. VornDick, C. Cude-Woods, C.L. Morris, C.-Y. Liu, D. Barlow, D.J. Morley, D.J. Salvat, E.B. Dees, E.I. Sharapov, E.R. Adamek, J.D. Bowman, J. Medina, J. Ramsey, J. Vanderwerp, K.P. Hickerson, L.J. Broussard, M. Makela, N.B. Callahan, P. Geltenbort, P.L. Walstrom, S. Currie, S.I. Penttila, S.J. Seestrom, S.K.L. Sjue, S.M. Clayton, T.L. Womack, W. Fox, Z. Wang","submitted_at":"2013-10-21T23:34:14Z","abstract_excerpt":"The UCN$\\tau$ experiment is designed to measure the lifetime $\\tau_{n}$ of the free neutron by trapping ultracold neutrons (UCN) in a magneto-gravitational trap. An asymmetric bowl-shaped NdFeB magnet Halbach array confines low-field-seeking UCN within the apparatus, and a set of electromagnetic coils in a toroidal geometry provide a background \"holding\" field to eliminate depolarization-induced UCN loss caused by magnetic field nodes. We present a measurement of the storage time $\\tau_{store}$ of the trap by storing UCN for various times, and counting the survivors. The data are consistent wi"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1310.5759","kind":"arxiv","version":3},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}