1. 10th stabilization meeting
6 juin 2018
10th stabilization meeting
Status of pole tips measurement

2. SIOS vibrometer’s first steps
Status
SIOS vibrometer’s first steps
Chosen sensor configuration
Tests description on IPHI mock-up
Preliminary tests at Saclay
First connection
Measurement on IPHI mockup
Mechanical support for IPHI
Reflecting surface
Pole tips measurement on CERN mock-up (dec. 2010)
Measurement configuration
Solutions to be studied
Planning
09/14/2010
-MichelFontaine- CLIC Stabilisation ("pied de page" et "date" -> onglet menu Affichage/En-tête)

3. Chosen sensor configuration
Commercial config.
Reflector type
Max. speed
Resolution (nm)
Range measurement (mm)
Connected sensors per acquisition unit
Price (k€)
Triple axis SP- TR
λ/10 mirror
0.8
0.1 to 1 according to working distance
0 à 2500 1 40
Adjustable focus LSV
All type of reflecting surface
1.5
0.1
240 à 2500 3 25
Mono-axis SPS
λ/10 mirror for max. resolution
0.3
30 à 70, 240 20
Chosen configuration :
3 axis working on differential mode or independently
Angle measurement available ±0.3 mrad
Beams distances 13mm
I/O analogical or digital-32bit mode (atmosphere correction factor included on digital mode only)
25/09/2008
-MichelFontaine- CLIC Stabilisation ("pied de page" et "date" -> onglet menu Affichage/En-tête)

4. Tests description on IPHI mock-up
Supporting sensor
Designed
Drilling hole (angle and diameter)
Ø3mm chosen
Reflecting surface (glued or polished?)
Glued with Loctite
Girder and actuators for controlled movements
Not available on IPHI
25/09/2008
-MichelFontaine- CLIC Stabilisation ("pied de page" et "date" -> onglet menu Affichage/En-tête)

5. On a stabilized optical bench
First connection
On a stabilized optical bench
Reference wavelength for tuning
Identified motor noise
25/09/2008
-MichelFontaine- CLIC Stabilisation ("pied de page" et "date" -> onglet menu Affichage/En-tête)

6. Mechanical support for IPHI
09/14/2010
-MichelFontaine- CLIC Stabilisation ("pied de page" et "date" -> onglet menu Affichage/En-tête)

7. First test on IPHI : environment frequencies transmitted
Presence of drilling and grinding machines at work in the hall
09/14/2010
-MichelFontaine- CLIC Stabilisation ("pied de page" et "date" -> onglet menu Affichage/En-tête)

8. Pole tip measurement on CERN mockup : measurement configuration
3 measurement positions 1 3 2 1 3 2 1 3 2
1- measurement on yoke
2- measurement on pole
3- measurement on pole
(1-2) and (1-3) vibration measurement between yoke and pole tip
(2-3) horizontal wave propagation on pole tip
Measurement conditions
Purpose
Results
No controlled vibration
See cultural noise influence on pole tips
FFT spectrum
Calibrated vibration on yoke
See propagation on yoke and poles
FFT spectra and propagation diagrams
Calibration vibration on girder
See girder’s influence on transmitting vibrations
25/09/2008
-MichelFontaine- CLIC Stabilisation ("pied de page" et "date" -> onglet menu Affichage/En-tête)

9. Pole tips measurement on CERN mockup : solutions to be studied
Supporting sensor
Drilling hole (angle and diameter)
Reflecting surface (glued or polished?)
Girder and actuators for controlled movements
All tests can be performed before on a similar device at Saclay
25/09/2008
-MichelFontaine- CLIC Stabilisation ("pied de page" et "date" -> onglet menu Affichage/En-tête)

10. Preliminary tests at Saclay : mechanical support design
Issues
Option chosen for Saclay tests
Measurement to be carried on
Vibrometer support
Glued or tightened on the yoke or independent :
Measurement on yoke
Measurement on pole tip
Reflecting surface mounting
Mirror glued on an invar made wedge
Hole drilled in yoke
Ø3mm wished, test on a vibrometer next Thursday
25/09/2008
-MichelFontaine- CLIC Stabilisation ("pied de page" et "date" -> onglet menu Affichage/En-tête)

11. Preliminary tests at Saclay : measurement intent IPHI mockup
Vibration transmission tests
Reflecting surface and glue tests measurement with glued mirror
Sensor mechanical interface
Hole diameter test OK
25/09/2008
-MichelFontaine- CLIC Stabilisation ("pied de page" et "date" -> onglet menu Affichage/En-tête)

12. Planning Task S O N D J F M Sensor bought and delivered
Reflector and sensor tests
Mechanical interface design
Measurements on IPHI mockup
Design and fabrication of mechanical interface for CERN mockup
1 point measurement on CERN mockup
N points measurement on CERN mockup
25/09/2008
-MichelFontaine- CLIC Stabilisation ("pied de page" et "date" -> onglet menu Affichage/En-tête)

13. Measurements at Saclay Measurements at CERN
Next steps
Measurements at Saclay
Measurements at CERN
25/09/2008
-MichelFontaine- CLIC Stabilisation ("pied de page" et "date" -> onglet menu Affichage/En-tête)