pacman study of fsi and µ-triangulation for the pre ... · pacman as a itn provides ec funding for...
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PACMAN study of FSI and µ-triangulation for the pre-alignment of CLIC
Hélène MAINAUD DURAND
Agenda
• PACMAN:
• As a ITN program
• Technical objectives
• Development of FSI for PACMAN:
• Introduction of FSI system
• Current status
• Developments foreseen
• Development of µ-triangulation for PACMAN:
• Introduction to µ-triangulation
• Current status
• Developments foreseen
Outline
a study on Particle Accelerator Components’ Metrology and Alignment to the Nanometer scale
PACMAN as a ITN
Provides EC funding for post-grads to participate in CERN project
Marie Curie action
Initial Training Network
• Improve career perspectives of Early Stage Researchers (ESR) in both public & private sectors
• Make research careers more attractive
Innovative Doctoral Program
• Management at CERN
• 10 ESR
• ESRs must be working towards a PhD
• Associated partners from industry and universities
• Secondment of at least 3 months in industry for each ESR
PACMAN as a ITN
High quality training program
3 PACMAN workshops
... Special emphasis put on women scientists
dedicated outreach activities...
• Training through research at CERN and at universities
• Through secondments in the industrial partners
• Scientific, academic and technological training courses organized by PACMAN
• Transferable skills training courses
• First workshop: 02-04 February 2015 setup the scenario
• Plus a workshop on Intellectual Property and Technology Transfer foreseen in 2016.
PACMAN Associated Partners
DMP ES
ELTOS IT
ETALON DE
METROLAB CH
SIGMAPHI FR
Hexagon Metrology DE
National Instruments HU
TNO NL
Cranfield University GB
ETH Zürich CH
LAPP FR
SYMME FR
University of Sannio IT
IFIC / FESIC ES
University of Pisa IT
Delft University NL
PACMAN : technical objectives
CLIC
Sub-micrometric beam size, down to a few nanometres at the IP
A number of challenges to mastered, among which:
• Very tight pre-alignment budget of error → 10 µm over 200 m
• Active stabilization of quadrupoles → nanometre range
PACMAN : technical objectives
Pre-alignment of components
Very important number of components
Compact
Very low error budget of pre-alignment
~ 4000 ~ 4000 ~ 140 000
14 µm 17 µm 17 µm
BPM Quadrupole RF structure
PACMAN : technical objectives
Metrology
Develop very high accuracy metrology & alignment tools and integrate them in a
prototype alignment bench
Extrapolate the tools & methods developed to other projects
Survey & alignment
Beam instrumentation
Radio Frequency
Nano-positioning
Magnetic measurements
PACMAN : scientific project
Prototype alignment bench
PACMAN : scientific project
PACMAN scientific project
Emphasis on subjects 1.2 & 1.3…
ESR Subjects Secondments Academic supervision
1.1 Non contact high precision sensor for Leitz
Infinity Coordinate Measuring Machine Hexagon
(3M + 2M) Cranfield
University
1.2 Development and validation of an Absolute Frequency Scanning Interferometry (FSI) network
Etalon (3M) ETH Zürich
1.3 Micro-triangulation for high accuracy short range measurements of dynamic objects
Etalon (3M) ETH Zürich
Development of a FSI for PACMAN
Absolute Multiline
• Absolute distance measurement
• 8 channels expandable to 100
• Uncertainty (95%) = 0.5 µm/m
• Traceable
• Measurement distance: 0.2 – 20 m
• Fibre length (20 m) extendable
FSI = Frequency Scanning Interferometry
Development of a FSI for PACMAN
• Coordinates determined via multilateration
• Good geometry
• Wide viewing angle retro reflector
• Compatible with µ-triangulation measurements
• Objective: new FSI target
Coordinate determination
Fibre end modification
• Exact position of beam splitter difficult to determine
• Modification to determine distances from known point
• Measurable by CMM & µ-triangulation
• Objective: adapt fibre end to fiducials measurable by CMM & µ-triangulation
Development of a FSI for PACMAN
• Need to make more than one measurement from a single station
• Possibility of using a divergent beam, seeing more than one reflector
• Potential issue: very low return intensity
• Utilisation of motorized device to rotate fibre end
• Objective: modification of the software to be able to determine more than one measurement station
Network development
Network analysis and simulation
• Data to be exploitable under LGC++
• Simulations to be performed under LGC++
• Objective: select best FSI network configuration
µ-triangulation for PACMAN
• Triangulation: angle measurements method used for 3D geodetic networks
• µ-triangulation:
• to short range measurements
• Precision ~ a few micrometers
• With high accuracy industrial theodolite
µ-triangulation
Configuration
• 1 total station Leica TDA 5005 (angle measurement stdev: 0.5’’ at 1σ)
• 1 CDD camera, monochromatic, 1032x778 pixels, with a pixel size of 4.65 µm x 4.65 µm
• 1 Focuser (stepper motor, two gears & rubber toothed belt)
• Illuminated targets
• Qdaedalus software
µ-triangulation for PACMAN
• Inventory of possibility of detection of a stretched wire
• Implementation of the algorithm
• Objective: new algorithm of detection
Detection of a stretched wire
Improvement of hardware
• Improvements in the components’ size & wireless connectivity
• Connect, control & measure several stations simultaneously
• Validate several types of targets (compatible with FSI, CMM and laser tracker)
• Objective: monitor dynamic objects in real time
µ-triangulation for PACMAN
Improvement of sofware
• Improve GUI
• Enhance auto-focus functionnality
• Upgrade Qdaedalus – LGC ++ communication
• Develop on-line, remote control of the system
• Objective: improve ease and speed of the measurement procedure
µ-triangulation &FSI for PACMAN
Upgrade of both technologies for PACMAN
Inter-comparison
• Between both on a dedicated mock-up → End of 2015
• With CMM measurements → mid 2016
Extrapolation towards a portable solution of measurement
Strategy
Development of a portable solution to replace CMM measurements: combination of FSI & µ-triangulation
PACMAN = golden opportunity for students, partners & CERN:
Summary
Upgrade for PACMAN
Development of common hardware &
software
Inter-comparison
Validation with CMM
measurements
Extrapolation to a portable
solution
• Exposure to leading edge technology
• Multidisciplinary & multi-cultural environment
• Work with large network of industries & universities
• High quality training & outreach activities
• Get trained manpower during the secondment
• Develop synergies with other partners
• Attract international researchers to strengthen their team
For students For partners
Thank you very much