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arXiv · 1404.3527

New source for ultracold neutrons at the Institut Laue-Langevin

F. M. Piegsa·M. Fertl·S. N. Ivanov·M. Kreuz·K. K. H. Leung·P. Schmidt-Wellenburg·T. Soldner·O. Zimmer
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Abstract

A new intense superthermal source for ultracold neutrons (UCN) has been installed at a dedicated beam line at the Institut Laue-Langevin. Incident neutrons with a wavelength of 0.89 nm are converted to UCN in a five liter volume filled with superfluid $^4$He at a temperature of about 0.7 K. The UCN can be extracted to room temperature experiments. We present the cryogenic setup of the source, a characterization of the cold neutron beam, and UCN production measurements, where a UCN density in the production volume of at least 55 per cm$^3$ was determined.

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F. M. Piegsa, M. Fertl, S. N. Ivanov, M. Kreuz, K. K. H. Leung, P. Schmidt-Wellenburg, T. Soldner, O. Zimmer. 2014-04-14. New source for ultracold neutrons at the Institut Laue-Langevin. https://doi.org/10.1103/physrevc.90.015501

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