GELEM-PEEM@PM3
Photoemission Electron Microscope (GELEM) /PM3
The PEEM instrument operated by the German-Eastern European LAboratory for Energy and MAteriels Research (GELEM) is designed both for a basic surface characterization with Hg-lamp excitation (offline) and absorption studies (XAS) with lateral resolution using synchrotron radiation (at a beamline).
The PM3 beamline merges the developments of the former BESSY I SX700 III monochromator for elliptically polarized VUV radiation and of BESSY II collimated plane grating monochromators. This way it is possible to achieve circular polarization from a BESSY II dipole in the range 20 – 2000 eV with high photon flux, high energy resolution and high stability.
Selected Applications:- Surface quality and structure characterization using work-function contrast
- Step-by-step observation of a surface oxidation process
- Monitor surface structure differences for modified molecular overlayers
- Absorption spectroscopy with lateral resolution: image of surface distribution of a selected chemical state, absorption spectra from selected areas on the sample surface
Methods
Remote access
not possible
| Instrument data | |
|---|---|
| Phone (~49 30 8062-) | 13429 |
| Beam availability | 24h/d |
| Source | D111 (Dipole) |
| Monochromator | PM3 |
| Energy range (at experiment) | tba |
| Energy resolution | 32000 at 64 eV |
| Flux | 1e9 - 1e10 |
| Polarisation | • horizontal • circular |
| Focus size (hor. x vert.) | 180 µm hor., vert. depends on exit slit |
| Temperature range | preparation: 300 – 3000 K measurement: 300 K |
| Pressure range | preparation: 10-10-10-5 mbar measurement: 10-10-10-8 mbar |
| Detector | Focus-PEEM |
| Manipulators | |
| Sample holder compatibility | Flag-style (Omicron) sample holders |
| Additional equipment | Preparation chamber with gas inlet, low- and high-temperature heaters, ports for evaporators |
| Additional information | Details beamline PM3 |