KMC-2
KMC-2
The KMC-2 beamline provides linearly polarized light in the energy range of 4 keV – 15 keV for X-ray absorption spectroscopies (EXAFS, XANES), fluorescence, diffractometry and reflectometry.
| Beamline data | |
|---|---|
| Segment | H09 |
| Location (Pillar) | 11.2 |
| Source | D9.2 (Dipole) |
| Monochromator | Si 111, Ge-graded |
| Energy range | 4 - 15 keV |
| Energy resolution | 1/4000 |
| Flux | dipole, 1e7 - 1e10 |
| Polarisation | linear horizontal |
| Divergence horizontal | 2.5 mrad |
| Divergence vertical | 0.5 mrad |
| Focus size (hor. x vert.) | 250 μm x 600 μm (4.8 μm x 4.8 μm with capillary optics; at XANES only, not available at Diffraction) |
| User endstation | not possible |
| Distance Focus/last valve | 2500 mm |
| Height Focus/floor level | 1465-1490 (depending on lateral position) mm |
| Beam availability | 24h/d |
| Phone | +49 30 8062 14623 |
| Applicable station(s) | |
| KMC-2 XANES | 293 K |
| KMC-2 Diffraction | 20-1000 °C |
The beamline provides an experimental set-up for EXAFS, XANES, and X-Ray fluorescence measurements at-air in the energy range of 4 keV – 15 keV. Beam intensity is stabilized by MOSTAB electronics with an accuracy of 0.3 %. The detector system consists of three ionization chambers, a Si-PIN photodiode for fluorescence measurements, a scintillation counter and an energy-dispersive detector (Bruker X-Flash). An add-on microprobe capillary system with the spatial resolution of >3.6 µm is available for micro-EXAFS, micro-fluorescence and micro-diffraction experiments. See endstation KMC-2 XANES for details.
For X-Ray diffractometry and reflectometry the experimental hutch is equipped with a 6-axis HUBER goniometer and a VANTEC 2000 area detector. An alternative point detector for high angular resolution is available. See endstation KMC-2 DIFFRACTION for details.
Original references
[1] A. Erko, I. Packe, W. Gudat, N. Abrosimov, A. Firsov: The Crystal Monochromator Based on graded SiGe Crystals, Nuclear Instruments and Methods in Physics Research A467–468, 358–361 (2001).
[2] A. Erko, I. Packe, C. Hellwig, M. Fieber-Erdmann, O. Pawlizki, M. Veldkamp, W. Gudat, KMC-2: the new x-ray beamline at BESSY II, AIP Conference Proceedings 521, 415-418 (2000).