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