München 2006 – wissenschaftliches Programm

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HK: Physik der Hadronen und Kerne

HK 45: Instrumentation und Anwendungen

HK 45.2: Vortrag

Donnerstag, 23. März 2006, 14:30–14:45, H

Characterization of solid converters for ultra-cold neutrons (UCN) in the framework of the Mini-D₂ project at the FRM-II reactor in Munich — •Daniele Tortorella, Igor Altarev, Andreas Frei, Erwin Gutsmiedl, F.Joachim Hartmann, Axel-Reimer Müller, Stephan Paul, Gerd Petzoldt, Rüdiger Picker, Wolfgang Schott, and Oliver Zimmer — Physik-Department, Technische Universität München, James-Frank-Strasse, D-85748 Garching

Super-thermal sources for UCN production are nowadays extensively under investigation or construction worldwide. In all those facilities essential component is the UCN converter. Materials like deuterium (D₂), heavy methane (CD₄) or oxygen in solid form are generally considered suitable. Because of the relatively low freezing temperature of these substances, a systematic characterization requires cryogenic environment (down to 5 K). In the framework of the Mini-D₂ project at the FRM-II reactor, using a dedicated apparatus, we present experiments performed to find out an optimum freezing procedure (mainly for D₂). Irradiation and optic investigation of the samples, including high-precision Raman spectroscopy, are discussed. Founded by MLL (Maier-Leibnitz-Laboratorium).