10th stabilization meeting

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Presentation transcript:

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

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)

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)

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)

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)

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

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)

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)

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)

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)

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)

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)

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)