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Methoden und Instrumentierung Poster: Mi., 14:00–16:30 M-P16
The new MAGS beamline: an instrument for hard x-ray diffraction at Bessy
Esther Dudzik 1 , Ralf Feyerherm 1
1 Hahn-Meitner-Institut Berlin/Bessy, Albert-Einstein-Str. 15, 12489 Berlin, Germany
To complement its existing neutron instrumentation, the Hahn-Meitner-Institute Berlin
has set up a new beamline for hard x-ray diffraction at BESSY which is now in user
operation. The beamline uses a 7 T multipole wiggler source to provide a high-intensity
focussed monochromatic beam with photon fluxes in the 10 12 (s 100 mA) −1 range at
photon energies from about 4 to 30 keV (with lower fluxes up to about 70 keV). It
has active bendable optics to provide flexible horizontal and vertical focussing and to
compensate the large heat load from the wiggler.
The experimental endstation consists of a six-circle Huber diffractometer which can
be used with an additional (polarisation) analyser. Two closed-cycle cryostats can be
used for temperature ranges of 7 to 800 K and 4 to 300 K, respectively; a 5 T magnet
is under construction. There are two detectors: a low energy Canberra Ge diode for
energy-resolved detection, and a compact scintillation detector.
The beamline is intended for single-crystal diffraction and (resonant) magnetic scattering
experiments, and the study of ordering phenomena and phase transitions, as well
as for the study of thin films, micro-, and nanostructures in materials science. First
experimental results prove that the beamline MAGS is a versatile tool for structural
investigations in a variety of different research areas ranging from basic solid state
physics to applications in materials science.