Specifications
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Photon source
source: | bending magnet, radius 5.5 m, magnetic field 1.2-1.45 T |
polarisation: | ~80% linear horizontal |
energy range: | white light, critical energy 3.2 keV @ 2.0 GeV or 5.5 keV @ 2.4 GeV operation |
Elettra storage ring parameters are available here.
Monochromator
Plane grating monochromator Bestec (SX-700 design) with a single gratinggrating | energy range | resolving power | photon flux * |
1200 lines/mm | 22-1000 eV | 7000 @ 22 eV | 1×108 ph/s |
6000 @ 30 eV | 3×108 ph/s | ||
5000 @ 40 eV | 1×109 ph/s | ||
4000 @ 70 eV | 5×109 ph/s | ||
3000 @ 100 eV | 1×1010 ph/s | ||
2000 @ 300 eV | 8×109 ph/s | ||
1000 @ 1000 eV | 5×109 ph/s |
* at 300 mA ring current, 2.0 GeV; 100/200 μm entrance/exit slit apertures. For more details see the next page.
![Photon energy resolution](/images/Documents/Materials Science/specifications/res-RP.png)
Beam dimensionsThe vertical beam size (FWHM of the intensity profile) decreases with photon energy from 0.3 mm to 0.15 mm at 200 eV and stays below 0.15 mm at all higher photon energies.In the horizontal direction the beam size is approximately 0.4 mm at all photon energies at normal incidence (60° emission off normal). This value is double at usual spectra acquisition geometry, normal emission (60° incidence off normal), i.e. 0.8 mm. |
Beam position stabilityIn the whole tuning range the maximum vertical beam displacement is 0.1 mm.The horizontal displacement at normal incidence (60° emission off normal) is 0.5 mm. This value is double at usual spectra acquisition geometry, normal emission (60° incidence off normal), i.e. 1 mm. |
Beam intensity profiles
![Photon beam profiles](/images/Documents/Materials Science/specifications/beam_profiles.png)
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Last Updated on Thursday, 09 March 2023 10:22