P09 Resonant Scattering and Diffraction beamline

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P09 is designed to operate in the tender and hard x-rays energy range from 2.7 to 31 keV, yet with full polarization control and polarization analysis mostly between 2.7 and 13.7 keV. The beamline consists of three experimental hutches. The first two experimental hutches, EH1 and EH2, are equipped with diffractometers as central instruments for resonant elastic X-ray scattering (REXS) on single crystals and thin films. The third hutch, EH3, is right now open port. Since 2017, X-ray magnetic circular dichroism (XMCD) experiments are also possible.

In Experimental Hutch 1, the psi diffractometer allows it for diffraction in the vertical (sigma-incident) or horizontal scattering (pi-incident) scattering and full azimuthal control only in the vertical scattering plane. Closed-cycle cryostats covering the temperature range between 1.7K and 700K are available. Complete windowless operation allows for REXS experiments in the tender X-ray range (e.g. at the Ru LIII edge). In addition other scattering experiments requiring good energy tuneability and variable polarization, can be performed like x-ray resonant magnetic reflectivity (XRMR). A 4 coils vector-electromagnet operating till 0.25 T and at 293 K is available allowing combined XRMR+XMCD on in-plane magnetized thin films.

Experimental hutch 2 is equipped with a heavy-load horizontal Psi-diffractometer allowing for larger and heavier cryostats in the pi-incident geometry only. A 14 T split-coil cryomagnet allows it for high magnetic fields diffraction till 14 Tesla in a temperature range between 2.3 K up to 300 K using the variable temperature insert or between 320 mK up to 2.3 K using the Helium-3 insert. A pulse tube cryostat operating between 4 and 300 K is available for high pressure single-crystal diffraction experiments using diamond anvil cells (DACs) where pressure till 30 GPa can be applied and monitored in situ. Finally, a 5T/1.5T/1.5T vector magnet set-up operating between 3 to 300 K is available allowing it for XMCD mostly on powder samples.