Experimental set-up
The first hard X-ray beamline at Bessy II is installed by BAM and PTB (Physikalisch-Technische Bundesanstalt - National Institute of Natural and Engineering Sciences) at a superconducting 7T wavelength shifter. The main optical elements of the beamline are a double-multilayer-monochromator and a double-crystal-monochromator. The two devices can be used separately or in-line.
Main applications of monochromatic radiation with photon energies up to 50 keV are X-ray fluorescence analysis, micro-computed tomography, X-ray topography, detector calibration and reflectometry.
| >> Wavelength shifter | |
|---|---|
| Magnetic field: | 7 T |
| Variation of magnetic field: | < 0,01 % |
| Characteristic energy: | 13,5 keV |
|
>> Double-crystal-monochromator> |
|
| Crystals: | Si(111) oder Si(311) |
| Photon energies: | 6 - 60 keV |
| Monoenergetic photon fluxdensity (max): | 1010 photons/mm2/s |
| energy resolution: | 1 - 2 • 10-4 |
|
>> Double-Multilayer-Monochromator |
|
| Multilayer coating: | 150 W/Si-layers (d = 2,8 nm) |
| Photon energies: | 4 - 40 keV |
| Monoenergetic photon flux density (max): | 1012 Photonen/mm2/s |
| Photon energies: | ca. 10-2 |
Berliner Elektronenspeicherring - Gesellschaft für Synchrotronstrahlung m.b.H. (BESSY)
Division 1.3 | BAM Equipment and facilities
Dr. rer. nat.