Berlin 2005 – wissenschaftliches Programm

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VA: Vakuumphysik und Vakuumtechnik

VA 2: Quanten, Neutronen und Positronen

VA 2.2: Vortrag

Montag, 7. März 2005, 11:20–11:40, TU E20

MIRA - A flexible instrument for long wave length neutrons — •Georgii Robert¹, Wagensonner Heinz¹, Mühlbauer Sebastian¹, and Böni Peter² — ¹ZWE FRM-II, TUM, Lichtenbergstr.1, 85747 Garching — ²E21, Physik-Department, TUM, James-Franckstr, 85747 Garching

MIRA, the beam line for very cold neutrons at the FRM-II is operational since September 2004. It provides a beam of cold neutrons ( 7Å<λ < 30Å). Additionally a polarised neutron beam with polarisation analysis is available. The instrument has several different operation modes. Currently it can be used as a reflectometer and as a SANS machine. A spin echo-option for these modes is under construction. The instrument is also ideally suited as a testing platform for new experimental set-ups as it is constructed in a modular way allowing for quick configuration changes.

Here the instrument together with first measurements will be presented. A reflectivity study, SANS measurements on MnSi and measurements on the magnetic vortices lattice in Nb will be discussed.