Slide: 1NSLS II stability workshop – Mechanical systems – Y. Dabin – April 17 – 20 -2007
Stability of instruments at the ESRF
Y.Dabin Head of mechanical engineeringESRF - Grenoble
Vibration stability
Thermal stability
With contribution of : Ph.Marion, L. Zhang, M.Lesourd,R.BAker, F.Pollack, JM.Dubuisson, JL.Marlat(Soleil)
Slide: 2NSLS II stability workshop – Mechanical systems – Y. Dabin – April 17 – 20 -2007
1 Better optic quality
2 Preserve beam coherence
3 Operation with High heat load
4 Better Vibration Stability
5 Better Thermal stab. (drifts – 24H – uniform)
6 High Precision – High resolution
ESRF Upgrade CDR issues about technical difficulties
100% of BL raisedThe following issues:
Slide: 3NSLS II stability workshop – Mechanical systems – Y. Dabin – April 17 – 20 -2007
High stiffness…………………………….KIntegrated damping (many frictions)…Mass damping…………………………...M
Transmission
Frequency
K
M
Hz50Mk
50
4.5 m1.5 m
Motorised Z mvt
Wide spread -> damping
Support table...final design
Floor
Horizontal Vib.
Slide: 4NSLS II stability workshop – Mechanical systems – Y. Dabin – April 17 – 20 -2007
Stability Minimum Degree of Freedom
2 Incidences
2 curvatures
Should be Kept
Slide: 5NSLS II stability workshop – Mechanical systems – Y. Dabin – April 17 – 20 -2007
The ultimate beam monitorFZP Magnified Image of the KB focal plane Effective pixel-size = 12 nm !Realtime visualisation possible
W Ludwig, P Cloetens
KB
FZP X-ray Magnification = 56
FReLoNOptics
Peak to peak movements(through cross-correlation)7 nm (vertical)3 nm (horizontal)
E = 9 keVKB aperture: 0.27 mm x 0.75 mmsecondary source open (0.5 mm)integration time: 1 s (full range FReLoN)1 m
Slide: 6NSLS II stability workshop – Mechanical systems – Y. Dabin – April 17 – 20 -2007
Slide: 7NSLS II stability workshop – Mechanical systems – Y. Dabin – April 17 – 20 -2007
At present: 3 Nano-Hutches
Next Upgrade : 15 Nano-Hutches
Air renewal rate: 20 cycles / hour
Vibrations from air flow reduced by porous ducts
New high flow rate air conditioning units
ID22 – Nano-Imaging-Fluorescence
Slide: 8NSLS II stability workshop – Mechanical systems – Y. Dabin – April 17 – 20 -2007
Slide: 9NSLS II stability workshop – Mechanical systems – Y. Dabin – April 17 – 20 -2007
Slide: 10NSLS II stability workshop – Mechanical systems – Y. Dabin – April 17 – 20 -2007
p =100 m source to opticq =0.1 m
z
Typical focusing optic sensitivity
Support table: Do we need antivib system under table support ?
Spot size: 100 nmStability : 10% = 10nm
Acceptable movements for the table sytem:
Radial : z = p/q
Acceptable z = ± 10 µm
Angular : = /q
Acceptable = ± 0.1 µrd
Angular vib.drifts much more critical than linearTransmitting floor vib. ( pv: 1µm ) seems acceptable
Slide: 11NSLS II stability workshop – Mechanical systems – Y. Dabin – April 17 – 20 -2007
ID19 microfocusing experiment
0
0.2
0.4
0.6
0.8
1
1.2
-200 -150 -100 -50 0 50 100 150 200
Nor
mal
ized
Inte
nsity
x [nm]
FWHM = 45nm
focal line - raw data
SourceID19
Curved graded ML
Focus
Graded MLFocus detection
Dynamical bender
Aperture slits
Beam
E = 24KeVF = 80 mmWD = 50 mm= 5.5 mrd
Slide: 12NSLS II stability workshop – Mechanical systems – Y. Dabin – April 17 – 20 -2007
Vibrations influence
XBPM and wavefront optimizationcamera
Vib. origin to be analysed Radial / angular ?
Camera noise estimate = 3 nm
Courtesy of O.Hignette
Slide: 13NSLS II stability workshop – Mechanical systems – Y. Dabin – April 17 – 20 -2007
Optic support from Desir beamline soleil
Design: F.Pollack, JM.Dubuisson (Soleil )
Slide: 14NSLS II stability workshop – Mechanical systems – Y. Dabin – April 17 – 20 -2007
All granite built-in movementsUltimate BPM
ID 22 Nano-Imaging transmission µscopePresent Spot size 80 nm
Slide: 15NSLS II stability workshop – Mechanical systems – Y. Dabin – April 17 – 20 -2007
ID13 nextNano-focusEnd-station
Service gantryManipulationAlignment
Cabling tableassistance
Mecartec tripod
Slide: 16NSLS II stability workshop – Mechanical systems – Y. Dabin – April 17 – 20 -2007
200 – 2000 eVbandwith
ML mirrors (fixed exit )
0.01 – 1 eVMonochromator
Precision mono
Substrat supply
High ratecooling
Thermal stability minimizing the spectral with for the precision monochromator
Angular
Radial
Slide: 17NSLS II stability workshop – Mechanical systems – Y. Dabin – April 17 – 20 -2007
End
show for the Wednesday working group
Slide: 18NSLS II stability workshop – Mechanical systems – Y. Dabin – April 17 – 20 -2007