Diffractometer/reflectometer for resonant magnetic x-ray scattering applications

The ALICE chamber was built as a diffractometer/reflectometer for XRMS applications and is in operation since December 2002. It combines a two-circle goniometer with an accessible range of 175° in 2θ. A magnetic field of ±7.1 kOe is available with a yoke that can rotate freely within the horizontal scattering plane. The whole chamber is mounted on a support frame and can thus be moved to various places (undulator or dipole beamlines) within the experimental hall, depending on the requirements of the experiment and beamtime allocation.

Selected Applications:
  • Spectroscopy (TEY, TR, FY, XMCD, XMLD)
  • Scattering (XRMS, Speckles)
  • Holography



Station data
Temperature range 10 K-475K
Pressure Range --
Detector IRD diode, CCD, APD
Manipulators --
Sample holder compatibility --
Remote Access
Magnetic Field Electromagnet: 7 KOe (for transmission), 3 KOe (for reflectivity), 1.1KOe (for fluorescence)
Assigned to beamline(s)
UE112_PGM-1 8 - 690 eV; for extreme values (<50 eV or >400 eV) contact the beamline crew
PM3 20 - 1900 eV
UE56-2_PGM-2 60 - 1300 eV
UE52_SGM 100 - 1500 eV
U49-2_PGM-1 85 - 1600 eV

"Although the chamber named ALICE was designed for the analysis of magnetic hetero- and nanostructures via resonant magnetic x-ray scattering, the instrument is not limited to this technique. Static measurements involve the possibility to use scattering and spectroscopy synchrotron based techniques (photon-in photon-out, photon-in electron-out, and coherent scattering). Dynamic experiments require either laser or magnetic field pulses to excite the spin system followed by x-ray probe in the time domain from nano- to femtosecond delay times. In this temporal range, the demagnetization/remagnetization dynamics and magnetization precession in a number of magnetic materials (metals, alloys, and magnetic multilayers) can be probed in an element specific manner. The versatility of the instrument was tested by a series of pilot experiments, pointing out ALICE as one of the most demanded instruments at the Helmholtz-Zentrum in Berlin."

For more details and current status of the experimental station contact the station manager.