Beamline I811 - Short information
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Beamline I811, is dedicated to materials science research in the photon energy range 2.4 - 20 keV, which corresponds to a wavelength interval of 0.6 - 5 Å. It is based on a super-conducting multi-pole wiggler that provides a high-flux photon beam for x-ray absorption and diffraction experiments. The beamline design is based on vertical collimation of the beam by a cylindrical mirror before a double-crystal monochromator, and vertical focusing on the sample by a second cylindrical mirror. The horizontal focus is obtained by sagittal bending of the second monochromator crystal. Experimental stations for x-ray absorption spectroscopy and surface-science dedicated x-ray diffraction are in user operation.
Contact persons:
Stefan Carlson, beamline manager
Refences:
T.M. Grehk and P.O. Nilsson,The Design of the Material Science Beamline, I811, at MAX II, Nucl. Instr. and Meth. in Phys. Res. A 467-468, 635, 2001.
S. Carlson, M. Clausen, L. Gridneva, B. Sommarin and C. Svensson,XAFS experiments at beamline I811, MAX-lab synchrotron source, Sweden, J. Synchrotron. Rad.13, 359, 2006.
Technical data:
| Source |
Multi-pole wiggler, period= 65 mm, 49 poles, Bmax = 3.5 T. |
| 1:st-mirror |
Water-cooled vertically bendable cylindrical mirror (R=2000 - 6700 m). |
| 2:nd-mirror |
Vertically bendable cylindrical mirror (R=800 - 5300 m). |
| Monochromator |
Double crystal pairs that can be altered between the Si(111) and Si(311) directions. The second crystal is bendable for horizontal focusing. |
| Wavelength range |
0.6 - 5 Å (2.4 - 20 keV) |
| Wavelength resolution |
E/dE ~ 104 |
| Photon flux on sample |
1011 - 1012 photons/ sec @ 9 keV. |
| Spot size on sample |
0.5(h) x 0.5(v) mm2. |
| Experimental techniques |
XAFS. Surface, interface and thin-film crystallography |
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