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Dresden 2011 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 22: Magnetic Measurement Methods

MA 22.5: Vortrag

Dienstag, 15. März 2011, 12:00–12:15, HSZ 403

The new high-intensity polarized neutron reflectometer of the Jülich Centre of Neutron Science — •Stefan Mattauch1, Denis Korolkov1, Ulrich Rücker2, Earl Babcock1, Alexander Ioffe1, and Thomas Brückel21JCNS,Institut für Streumethoden, Forschungszentrum Jülich GmbH — 2Institut für Streumethoden, Forschungszentrum Jülich GmbH

The Jülich Centre of Neutron Science (JCNS) is building the new, high-intensity reflectometer MARIA in the neutron guide hall of the FRM II reactor in Garching. Unique features of MARIA include (i) vertical focussing with an elliptic guide from 170 mm down to 10 mm at the sample position, (ii) reflectometer and GISANS mode, (iii) polarization analysis over a large 2d position sensitive detector as standard, (iv) adjustable wavelength spread from 10 to 1 % by a combination of velocity selector and chopper, (v) flexible sample table using a Hexapod for magnetic field and low temperature sample environment and (vi) in-situ sample preparation facilities. Together with a 400 x 400 mm2 position sensitive detector and a time-stable 3He polarization analyzer based on Spin-Exchange Optical Pumping (SEOP), the instrument is dedicated to investigate specular reflectivity and off-specular scattering from magnetic layered structures down to the monolayer regime. In addition the GISANS option can be used to investigate lateral correlations in the nm range. This option is integrated into the reflectometer*s collimation, so it can be chosen during the measurement without any realignment.
The results of the first experiments will be presented at the conference.

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