J. Horbach for Desy FS-BT
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Transcript of J. Horbach for Desy FS-BT
J. Horbach for Desy FS-BT
DESY FS-BT at PETRA III: Optics and Large Monochromator Systems.
- Selection of a small energy band out of the High Heat Load monochromator beam
- Vertical shift of the beam by 1.25 m
- Stabilization of the beam position at the experiment
- Energy rangeSi 311: 5.4 – 18.8 keVSi 511: 8.4 – 29.4 keV
- Precision of the beam position at the experiment (distance approx. 20 m): 10 µm in lateral and vertical direction→ Angular accuracy of 0.5 µrad needed
Large Offset Monochromator in operation at P08
Large Offset Monochromator in operation at P03
- Displacement of the white beam by 0.49 m downwards
- Energy range 8 - 25keV
- Beam position stability of 1µm required at the experimental station
- Liquid nitrogen cooling system for both crystals (Si 111) and multilayers
Monochromator at P06manufacturing in progress at DESY-Zeuthen
Multilayer setup with fixed position
LN2 flexible tubes
Movable multilayer setup
3.9 m
- Displacement of the white beam by 21 mm downwards
- Energy range 6 – 90 keV
- Liquid nitrogen cooling system for both multilayers
10 mm offsetupwards
mirror: silicon oxide (fused silica)coatings: palladium
mirror 2 is bendable(concave, radius: 5 – 50 km)
Focussing mirrors in operation at P09
resolutions:- translations: 100 nm- rotary table: 40 nrad- pitch angle: 15,3 nrad
High Heat Load Monochromators in operation at several beamlines
- 50 µrad resolution of bragg axis- 18 nrad resolution of bragg piezo- offset 21 mm upwards
ion getter pump
micromover for alignment oflower linear drive
micromover for alignment ofupper linear drive
vacuumfeedthroughs
Mirrors for higher-order suppression
under construction at P06
16 mm offset to the right
mirror: siliconcoatings: chrome, platinum
in operation at P10
6,5 mm offset to the left
10 mm offset downwards
mirror: siliconcoatings: molybdenum, palladium
in operation at P03
Diamond / Si Laue monochromator in operation at P02
side station with fixed energy at 60 keV
DiamondSi
mirror: silicon oxide (fused silica)coatings: platinum, rhodium
profile of mirror 1
profile of mirror 2
radius 88 mm radius 58 mmPd
Pd