1. AMULET Advanced Metrology Using LasEr Tracers (and various other bits)
JAI Industry Event
AMULET Advanced Metrology Using LasEr Tracers (and various other bits) 1

2. Overview Background and Aims Project Status Project Plans AMULET C-FIT
CAOX
Project Plans

3. Background & Aims
LiCAS & MONALISA project ended prematurely with termination of UK-ILC activities 1.5 years ago
Aim to commercially exploit technology developed from these projects (some were born in ATLAS)
While doing so reconnect the team to a new accelerator science project

4. AMULET (background)
Bring FSI technology into a commercial instrument (LaserTracer)
NPL-JAI-EPSRC funded project with industrial partner (ETALON AG)
3 years, start Jan. 2010, £600k, collaboration with NPL and ETALON
Two international patents pending
LiCAS know-how registered at ISIS
Laser Tracer

5. AMULET (main tasks)
Measure tens of meters to few micron accuracy and sub micron resolution.
More practical reference interferometers (compact, cheap, coiled fibres instead of huge evacuated Invar tubes)
More “traceable” length reference
More dynamic measurement (kHz instead of Hz)
Integrate into Tracer mechanics while keeping original functionality alive

6. AMULET Status (Fibre Calibration: Dispersion and “optical CTE”)
Fibres calibrated using acetylene gas cells
Initially calibrated OPD vs. temperature (PT-100)
Now calibrate OPD vs phase advance between two absorption peaks instead  more traceable, cheaper
PT100 better resolution but worse accuracy
Gas Cell Calibration (avg. 100 shots)
PT100 Calibration (avg. 100 shots)
700
Hz/rad
700
Hz/rad
700
Hz/rad
Residual
Residual
Phase Advance (Radians)
PT100 Resistance (Ohms)

7. AMULET Status (Scale Error Measurements)

8. AMULET Status (Dynamic FSI)
Measured target on a Piezo oscillator
Success over a range of frequencies
Limited by linear speed of target
500 Hz oscillation
100 Hz oscillation
0.05 s
0.05 s
Distance measured / m
Distance measured / m
1.5 µm
0.6 µm
Time / s
Time / s

9. AMULET Status (Dynamic FSI)
Can calculate lengths for each data point
take data at 2.77 MHz (exceed specs x 1000)
50 nm errors due to phase extraction errors or air turbulence
Time resolution
Stationary target stability
5 µs
0.7 s
Distance measured / m
Distance measured / m
1 nm
50 nm
Time / s
Time / s

10. AMULET Status (Hybrid Tracer)
Started integration into Laser Tracer head
1560nm & 633nm light through same optical system.
Bench top experiment works
Issues: ¼ wave plates and focussing optics
FFI data taken with 633 and 1560 nm laser light
nm fringes nm fringes
Intensity
Intensity
26*1560/633=64.08
Data Point

11. Commercialising Frequency scanning Interferometry Technology
C-FIT
Commercialising Frequency scanning Interferometry Technology

12. X-FEL
prototype
C-FIT (background)
SLAC metrology department invited AMULET team for 2 week demo of technology (fully sponsored by SLAC $80k)
Problem: LCLS-II will use variable-gap undulators
Field maps vs. gap size (off-line, in calibration facility).
Gaps tuned to 1 micron absolute (on-line during use in accelerator)
Can we do this ?

13. C-FIT (SLAC visit outcomes)
Yes We Can !
SLAC understood test undulator motion (butterfly folding its wings by few microns very slowly)
SLAC want 24 ch. FSI system from us
$100k requested in September
Budget decision in next few weeks
Main points for improvement:
speed of analysis software
more hardware integration
Matching Fell-Fund application to upgrade and build from surplus MONALISA DAQ
12 months, £62k=$100k, start Jan 2012
2.5 h

14. C-FIT (the small print)
If C-FIT system works
Might integrate FSI into all LCLS-II undulators
O(500 channels)
fully integrated into LCLS-II operations systems (new electronics, ultra high reliability)
possibly fully commercial system
JAI joins LCLS-II collaboration
LCLS-II = X-Ray FEL
JAI core strategy = build ultra compact X-Ray FEL (driven by laser plasma accelerator)
LCLS-II also interested in Smith Purcell bunch profiler
fit, glove, etc.

15. CAOX Analysis of geometric networks
Invented by Patrick Brockill for LiCAS
IP protection in progress
Company interested
integrating into their product
Obtained PIA grant to evaluate PETRA-III network with CAOX
Expect comparison to SA & next step Nov. 2011
Applying for second PIA grant to speed code up

16. Future Plans (summary, for work plans see backup slide)
AMULET:
will complete in Jan 2013 hopefully with tracer ready to go
fully funded until then
SLAC offered several projects to A. Lancaster to bolster accelerator science aspects of thesis
support from mechanical and electronics engineering and workshops was included in the grant
C-FIT:
If Fell Fund comes through, complete in Jan 2013
apply for Follow-On-Fund to build LCLS-II system by 2015
apply for PRD fund to get more involved in undulator and FEL aspects at LCLS-II
small amounts of electronics engineering and workshop needed
CAOX:
after next PIA grant (this year) complete comparisons of codes
apply for IPS funding with contribution from NRK for 1-3 year project on full code integration, starting mid 2012
minor computing support needed

17. Thank you for your attention
Questions?

18. Future Plan (AMULET details)
Fibre Reference Interferometers
Repeat calibration of fibres.
Gas cell background subtraction to improve measurement.
Develop portable fibre container.
Tracer Integration
Verify optics compatibility (1550nm and 633nm).
Test portable photo diode boards.
Design and build combined tracer head.
Produce dichroic beam splitters
Produce multiple wavelength antireflection coated optics
Test Hybrid tracer
Test fibre calibration with hybrid tracer.
Laser Development
Work with New Focus to bring down the cost of the FSI lasers and improve functionality