Deutsche Tagung f ¨ur Forschung mit ... - SNI-Portal

Methoden und Instrumentierung Vortrag: Do., 11:50–12:10 D-V40
N-REX + -
The New Neutron / X-Ray Reflectometer for Materials Science at FRM II
Adrian Rühm 1,2 , Max Nülle 1 , Felix Maye 1,2 , Janos Major 1 , Helmut Dosch 1
1 Max-Planck-Institut für Metallforschung, Stuttgart – 2 Forschungsneutronenquelle
Heinz Maier-Leibnitz, FRM II, Garching
In the framework of the Max Planck initiative “Materials and Solid-State Research at
the New Neutron Source FRM II” a novel neutron/X-ray-contrast reflectometer for
materials science, N-REX + , is currently being commissioned at FRM II. It enables
the simultaneous characterization of samples with both neutrons and X-rays, which
is especially interesting for in-situ studies of time-dependent processes. Another focus
lies on the further development of the spin-echo resolved grazing incidence scattering
(SERGIS) technique, as well as its utilization in a routine manner for the study of
in-plane correlations on surfaces, interfaces and thin films. Complementary to conventional
angle-resolved diffraction techniques, this novel spin-encoded real-space method
is well suited for the study of length scales from the nanometer up into the micron
range. No in-plane collimation of the beam is required, so that a remarkably high
neutron flux is available at the detector for all in-plane length-scales to be examined.
Systems to be investigated at N-REX + with this new characterization method
range from self-assembled and artificial nanostructures over rough and modulated surfaces
and interfaces to polymers and biological membranes. First experimental results
demonstrating the diverse capabilities of the instrument will be presented.