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A novel apparatus for the investigation of material properties for the storage of ultracold neutrons |
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| Authors: | T. Bry , M. Daum, P. Fierlinger, P. Geltenbort, D. George, M. Gupta, R. Henneck, S. Heule, M. Horvat, M. Kasprzak, K. Kirch, K. Kohlik, M. Negrazus, A. Pichlmaier, U. Straumann, V. Vrankovic,C. Wermelinger |
| Affiliation: | aPSI, Paul Scherrer Institut, CH 5232 Villigen PSI, Switzerland bPhysik-Institut, Universität Zürich, Switzerland cILL, Institut Laue-Langevin, Grenoble, France dJagiellonian University, Cracow, Poland eSMI, Stefan-Meyer-Institut, Vienna, Austria fETHZ, Eidgenössische Technische Hochschule Zürich, Switzerland |
| Abstract: | We have built a novel apparatus for the investigation of materials for the storage of ultracold neutrons. Neutrons are filled into a storage volume, confined at the bottom by a magnetic field, at the top by gravity and at the sides by the slit-less sample surface under investigation. For different beryllium and diamond-like carbon samples, storage times up to 200 s were obtained at room temperature. The corresponding loss parameters η for ultracold neutrons varied between 4.2 and 6.8×10-4 per wall collision. |
| Keywords: | Ultracold neutrons Diamond-like carbon Ultracold neutron storage Ultracold neutron losses Anomalous losses Magnetic mirrors |
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