Berlin 2005 – wissenschaftliches Programm

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HK: Physik der Hadronen und Kerne

HK 21: Instrumentation und Anwendungen

HK 21.1: Gruppenbericht

Montag, 7. März 2005, 14:00–14:30, TU MA042

Investigation of solid D₂ for UCN sources — •K. 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, S. Heule¹, M. Kasprzak^1,2,4, J. Kohlbrecher¹, J.A. Konter¹, G. Kühne¹, M. Kuźniak^1,2, A. Michels¹, A. Pichlmaier¹, Y. Pokotilovskiy⁶, U. Szerer², M. Utsuro⁵, M. Wohlmuther¹, A. Wokaun¹, and J. Zmeskal⁴ — ¹PSI, Villigen, CH — ²JU, Cracow, PL — ³ILL, Grenoble, FR — ⁴OeAW, Wien, AU — ⁵KU, Kyoto, JP — ⁶JINR, Dubna, RU

Solid deuterium (sD₂) will be used for the production of ultra-cold neutrons (UCN) in the PSI UCN source. In order to optimize the source performance it is important to know the UCN production cross sections as well as the relevant cross sections for UCN transport out of the sD₂. Also future cold moderator development calls for knowing neutron cross sections in liquid D₂. In addition, the scattering system, neutron-D₂, is simple enough to allow a complete theoretical treatment; thus measured cross sections should be compared with theoretical models. We report on transmission measurements of slow neutrons (CN, VCN, UCN) through gaseous, liquid and solid D₂ and the extraction of total scattering cross sections. We also give results from a recent experiment in which UCN have been produced from a cold neutron beam on gaseous, liquid and solid D₂ targets.