Investigation of guides for ultracold neutrons

Issue title: 4th International Workshop on Neutron Delivery Systems, Institut Laue Langevin, Grenoble, September 28–30, 2015

Guest editors: Jérôme Beaucour

Article type: Research Article

Authors: Wlokka, S.^{a; *} | Fierlinger, P.^b | Frei, A.^a | Geltenbort, P.^c | Huber, T.^a | Paul, S.^b | Schreckenbach, K.^{b; †} | Stoepler, R.^b

Affiliations: [a] Heinz Maier-Leibnitz Zentrum, Technische Universität München, Lichtenbergstr. 1, 85748 Garching, Germany | [b] Physik-Department E18, Technische Universität München, James-Franck-Straße 1, 85748 Garching, Germany | [c] Institut Laue–Langevin, 71 Avenue des Martyrs, 38000 Grenoble, France

Correspondence: [*] Corresponding author. Tel.: +49 (0)89 289 13739; Fax: +49 (0)89 289 13742; E-mail: stephan.wlokka@tum.de.

Note: [†] Deceased.

Abstract: We have investigated new guides for ultracold neutrons (UCN) produced with the so-called Replika-method. A Nickel–Vanadium alloy was used as reflecting material. The transport properties for UCN were measured at the PF2/TES beam at the Institut Laue–Langevin. We measured a transmission of (0.990±0.006) m−1 and storage times varying from 20–40 s depending on the length of the guide system. The diffuse reflectivity was also measured yielding a value of 0.030±0.005. A new type of UCN distribution switch was also tested with a transmission of 0.92±0.01.

Keywords: Ultracold neutrons, ILL, FRM II, Replika, UCN guides

DOI: 10.3233/JNR-160029

Journal: Journal of Neutron Research, vol. 18, no. 4, pp. 109-116, 2015