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

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

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

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

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

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)

AMULET Status (Scale Error Measurements)

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

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

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 26 1560nm fringes 64 633nm fringes Intensity Intensity 26*1560/633=64.08 Data Point

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

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 ?

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

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.

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

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

Thank you for your attention Questions?

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