Köln 2004 – scientific programme
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HK: Physik der Hadronen und Kerne
HK 42: Nuclear and Particle Astrophysics III
HK 42.2: Group Report
Thursday, March 11, 2004, 14:00–14:30, F
Investigation of solid D2 for UCN sources — •Klaus Kirch1, F. Atchison1, K. Bodek2, B. van den Brandt1, T. Bryś1, M. Daum1, P. Fierlinger1, P. Geltenbort3, M. Giersch4, P. Hautle1, M. Hino5, R. Henneck1, M. Kasprzak2, J. Kohlbrecher1, J.A. Konter1, G. Kühne1, M. Kuźniak2, K. Mishima6, A. Pichlmaier1, D. Rätz1, A. Serebrov1,7, M. Utsuro6, A. Wokaun1, and J. Zmeskal4 — 1PSI, Villigen, CH — 2JU Cracow, PL — 3ILL Grenoble, FR — 4IMEP Wien, AU — 5KURRI, Kyoto, JP — 6RCNP Osaka, JP — 7PNPI Gatchina, RU
Solid deuterium (sD2) is a favourite converter material for the production of ultra-cold neutrons (UCN) in the next generation of UCN sources. Some of its critical neutronic properties still remain to be investigated. Among these, the most important ones concern UCN scattering cross sections which determine the extraction efficiency of UCN from sD2 and thus the source yield. These cross sections might depend on specific conditions of a given sD2 sample and could possibly be influenced. An apparatus for the preparation and characterization of solid deuterium samples for neutron beam experiments with simultaneous optical control has been built. We report first results from transmission and scattering experiments with cold, very cold and ultra-cold neutrons on sD2 along with light transmission and Raman scattering studies.