ALICE
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
Methods
| 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." http://dx.doi.org/10.17815/jlsrf-2-83
For more details and current status of the experimental station contact the station manager.