PHARAO
X-ray diffraction during molecular beam epitaxy (MBE) /U125-KMC
The PHARAO instrument at the KMC-branch of the undulator U-125 makes use of the omnipresent, high energy wiggler part of the U125-2 undulator resulting in a remarkable peak brilliance of about 1012 ph/s/mm2/mrad2/0.1%BW at 10 keV.
PHARAO combines MBE with the option to monitor crystal growth and related phenomena at interfaces and surfaces under ultra high vacuum conditions in-situ by high-resolution x-ray diffraction. The growth chamber is equipped with cylindrical, x-ray transparent Be-windows for the incident and diffracted x-rays. PHARAO hosts a highly specialized chamber for the growth of oxide materials to pioneer crystal growth and growth related phenomena of new materials (as e.g. two-dimensional van der Waals systems) using in-situ capabilities.
Selected Applications:- study of surface and interface phenomena during crystal growth via molecular beam epitaxy
- strain induced phase formation and stabilization
- crystal lattice dynamics upon thermal annealing under UHV conditions
Methods
Remote access
not possible
| Instrument data | |
|---|---|
| Phone (~49 30 8062-) | |
| Beam availability | 12 h/d |
| Source | U125-2 |
| Monochromator | KMC |
| Energy range (at experiment) | 6 - 12 keV |
| Energy resolution | 1500 |
| Flux | 109 cps |
| Polarisation | horizontal |
| Focus size (hor. x vert.) | 0.5 mm x 0.5 mm |
| Temperature range | 280 - 1273 K |
| Pressure range | UHV |
| Detector | Dectris 300k |
| Manipulators | -- |
| Sample holder compatibility | -- |
| Additional equipment | |
| Additional information | Further information: Beamline U125/2-KMC |
PHARAO is operated as a collaborating research group (CRG) instrument and is maintained by the Paul-Drude-Institut (PDI) für Festkörperelektronik Berlin, Institut der Leibniz-Gemeinschaft.
For details and current status of the experimental station please contact Michael Hanke hanke@pdi-berlin.de.