H. MAINAUD DURAND

Pre-alignment status

OUTLINEMonitoring of QD0 (slides from NIKHEF)PACMAN project

MDI, 24/05/2013

Monitoring of QD0

Objectives: monitoring of the position of 2 QD0 according to 4 DOF

Monitoring of QD0

Monitoring of QD0

Monitoring of QD0

Reference Rings are mounted around the QD0s

Two rings per QD0, for 4 wheels with zerodur spokes

Monitoring of QD0

Monitoring of QD0

Monitoring of QD0

Transfer quality ~ 0.1 μm (12 dismounting /remounting)

Thermal expansion driven by granite thermal expansion, and confirm that the thermal expansion of zerodur is very small

Young modulus checked.

Next steps:

Sensors Raschain under validation on short range on TBTM

Setup to calibrate sensors (12 m) is under preparation

Design of a four 3.5 m spoke set-up

PACMAN scientific project

Starting point = challenge concerning the pre-alignment of the CLIC components.

Requirements:

Current strategy

Series of steps: fiducialisation of the components and their support, alignment on a common support, alignment in the tunnel using sensors fiducials.

but time and precision consuming

The zero of each component will be included in a cylinder with a radius of a few microns:

14 µm (RF structures & MB quad BPM) 17 µm (MB quad) 20 µm (DB quad)

13

Fiducialisation of components

Fiducialisation of their common support

Alignment on a common support

Whole assembly ready to be aligned

Scientific project

PACMAN project:

Propose and develop an alternative solution integrating all the alignment steps and technologies at the same time and location (CMM machine)

Technologies concerned:

Beam Instrumentation Metrology Micrometric

alignmentNano

positioningMagnetic

measurementsUltra high precision

engineering

DMP ES

ELTOS IT

ETALON DE

METROLAB CH

SIGMAPHI FR

Cranfield University GB

ETH Zürich CH

LAPP FR

SYMME FR

University of Sannio IT

IFIC / FESIC ES

Delft University of Technology NL

Hexagon Metrology DE

National Instruments HU

TNO NL

EC fundings for 10 PhD students

Start date (TBC): 1/09/2013

Duration: 4 years

Marie Curie Initial Training Network (ITN):

Web site: http://cern.ch/pacman

Opening of applications: mid June 2013

Innovative Doctoral Program

CERN as host institution

15 associated partners

Conclusion

2 main subjects addressed currently:

The monitoring of the position of QD0, through a collaboration with NIKHEF• Concept proposed• First tests performed on 1m long spokes• Sensors under validation on TBTM

The improvement of the fiducialisation process via PACMAN

Other subjects need to be tackled, common to CLIC and ILC:

How to link left / right parts of the tunnel

Micrometric adjustment according to 6 DOF