Next planned test steps on two beam prototype modules
07-02-11 H. MAINAUD DURAND
With input from Michail Anastasopoulos, Nicolas Chritin, Sylvain Griffet, Juha Kemppinen, Raphaël Leuxe, Mateusz Sosin
Special thanks to Serge Lebet and Philippe De Souza
2
Two beam prototype modules
Validation of the following strategies [Q1 - Q3 2011]
o Pre-alignment of the components on their support within 10 microns, inter-comparison between methods (AT 401, micro-triangulation,…)
o Articulation point : the adjacent extremities of girders follow within a few microns
o Micrometric adjustment using linear actuators
Alignment systems providing a determination of the position with micrometric accuracy and precision [Q2 - Q4 2011]
o Inter-comparison between oWPS and cWPS
o Inter-comparison between RASNIK and WPS [Q3 - Q4 2011]
Active pre-alignment: tests of the algorithms [Q2 2011]
Feedback concerning schedule, cost, general strategy of installation, and two beam modules in CLEX
Compatibility with other systems (vacuum, waveguides,…), stability [Q3 2011 – Q3 2012]
Short term program & expected results by end of 2012
Zoom on the next 6 months…
Installation & validation of alignment systems
Qualification of linear actuators (1DOF tests)
Alignment of Micro-contrôle girders w.r.t station unit
TestsWith external constraints
Once girders are re-installed in 169
Mid March
[2 months]Tests
Without external constraints (vacuum, waveguides)
Fidu
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imen
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4
Zoom …
Install & adjust plates
Install & adjust stretching devices
Install cWPS sensors + tiltmeters
Installation & validation of alignment systems
On concrete blocks On girders + cradles Around modules
Install cWPS
install tilt meter
Install cables + acquisition system
Prepare software
Install stretched wires
Validation of alignment systems
(radial & vertical displacements of wires in order to check proportional responses of sensors)
(Michail) (Michail)
5
Zoom …
1 DOF test bench (Mateusz)
Qualification of linear actuators (1DOF tests)
1DOF test bench : design ok, assembly ok, software ready end of this week
Qualification of Boostec linear actuators one per one [week 07 & 08]
Qualification of Micro contrôle linear actuators one per one [week 09 & 10]
Tests foreseen (over the whole range):
Linearity
Repeatability
Resolution
Determination of backlash
6
Zoom … Tests
Qualification of concept of articulation point (Micro-contrôle versus Boostec/CERN:
• Metrological evaluation
• Behavior of the articulation point w.r.t micrometric displacements, w.r.t larger displacements (+/- 1mm)
• Impact at beam level
• Impact of displacements on adjacent articulation points
• Validation of algorithm of repositioning
• Implementation of active pre-alignment
(Mateusz Sosin)
Zoom … Fiducialisation and dimensional control
Inter-comparison between methods:
• Romer Arm: order, reception tests & « prise en main »
• Laser Tracker AT 401: order, reception tests & « prise en main »
• Micro-triangulation: development of software, qualification tests, order of material
Preparation, follow-up of all dimensional controls & fiducialisation on components. (see table)
Zoom … Fiducialisation and dimensional control
(Sylvain)
9
Validation of sub-micrometric active alignment using WPS sensors and cam movers [Q1-Q2 2011]
Compatibility with stabilization requirements (first Eigen frequency > 50 Hz) [Q2 2011]
Feedback for design of the MB quad mock-up type 1 and 4, foreseen for the two beam
prototype modules in lab and CLEX [Q3 2011 - Q1 2012]
MB quad mock-up
Short term program & expected results by end of 2012
Mock-up ready [end of February 2011]
Validation of the algorithm of repositioning [Q1-Q2 2011]
(Michail, Raphaël)
