next planned test steps on two beam prototype modules

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)

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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)