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9th stabilization meeting

9th stabilization meeting. Status of pole tips measurement. Status. Choice of the measurement device Requirements Tests results Chosen sensor configuration Pole tips measurement on CERN mock-up (dec. 2010) Measurement configuration Solutions to be studied Preliminary tests at Saclay

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9th stabilization meeting

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  1. 9th stabilization meeting Status of pole tips measurement

  2. Status • Choice of the measurement device • Requirements • Tests results • Chosen sensor configuration • Pole tips measurement on CERN mock-up (dec. 2010) • Measurement configuration • Solutions to be studied • Preliminary tests at Saclay • Glue tests • Reflecting surface • Mechanical support • Measurement intent on IPHI mockup • Planning -MichelFontaine- CLIC Stabilisation ("pied de page" et "date" -> onglet menu Affichage/En-tête)

  3. Choice of the measurement device : requirements • Requirements : • Characteristics to be described -MichelFontaine- CLIC Stabilisation ("pied de page" et "date" -> onglet menu Affichage/En-tête)

  4. Choice of the measurement device : tested sensors -MichelFontaine- CLIC Stabilisation ("pied de page" et "date" -> onglet menu Affichage/En-tête)

  5. Choice of the measurement device : POLYTEC fiber vibrometer tests results Tests results on CERN bench (graphics by M. Guinchard) ampl 230nm ampl 190nm ampl 16nm ampl 18nm Good Bad 100 Hz Capacitive senson 10 Hz Geophone Vibrometer ampl 3.2nm ampl 1.9nm Impossibility to have a measurement result at 1 Hz : sensor rejected -MichelFontaine- CLIC Stabilisation ("pied de page" et "date" -> onglet menu Affichage/En-tête)

  6. Choice of the measurement device : chosen sensor configuration • Chosen configuration (02/08/2010 meeting CR-MF/2010-1990a) : • 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) Available configurations -MichelFontaine- CLIC Stabilisation ("pied de page" et "date" -> onglet menu Affichage/En-tête)

  7. Pole tip measurement on CERN mockup : measurement configuration 3 measurement positions 3 3 3 2 2 2 1 1 1 3- measurement on pole 1- measurement on yoke 2- measurement on pole (2-3) horizontal wave propagation on pole tip (1-2) and (1-3) vibration measurement between yoke and pole tip -MichelFontaine- CLIC Stabilisation ("pied de page" et "date" -> onglet menu Affichage/En-tête)

  8. 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 -MichelFontaine- CLIC Stabilisation ("pied de page" et "date" -> onglet menu Affichage/En-tête)

  9. Preliminary tests at Saclay : glue tests and reflecting surface choice OK : mirror glued Signal comparison NO: surface to be polished • Purpose : • Verify that no damping due to the glue alter the displacement measurement • Choose the glue type (wax, araldite, other?) • Time effects on glue • Test : -MichelFontaine- CLIC Stabilisation ("pied de page" et "date" -> onglet menu Affichage/En-tête)

  10. Preliminary tests at Saclay : mechanical support design -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 Sensor mechanical interface Hole diameter test -MichelFontaine- CLIC Stabilisation ("pied de page" et "date" -> onglet menu Affichage/En-tête)

  12. Planning -MichelFontaine- CLIC Stabilisation ("pied de page" et "date" -> onglet menu Affichage/En-tête)

  13. Next steps Hole diameter test on Thursday Sensor device order march-april Sensor delivery 12 weeks after (?) Mirrors and wedges bought in march -MichelFontaine- CLIC Stabilisation ("pied de page" et "date" -> onglet menu Affichage/En-tête)

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