1. LiCAS Applied Geodesy Group Warsaw University 22.06.2005, RHUL, EuroTeV WP7, LiCAS Armin Reichold, JAI@Oxford1 LiCAS Linear Collider Alignement and Survey

2. 22.06.2005, RHUL, EuroTeV WP7, LiCASArmin Reichold, JAI@Oxford2 Overview What is LiCAS The ILC survey problem The RTRS concept The LiCAS measurement principles LiCAS group members and collaborators Progress since last meeting (11.03.05) FSI LSM Prototype Production Plan for the next 6 months

3. 22.06.2005, RHUL, EuroTeV WP7, LiCASArmin Reichold, JAI@Oxford3 LC Survey Problem Survey = multi step process with single tolerance budget driven by accelerator physics: component construction component fiducialisation component Survey  LiCAS machine Alignment  LiCAS Components Survey: 200  m vertical = our slice of tolerance budget over 600m = O(betatron) wavelenght Open air survey too inaccurate and too slow New instrument  RTRS (Rapid Tunnel Reference Surveyor) RTRS uses LiCAS survey technology

4. 22.06.2005, RHUL, EuroTeV WP7, LiCASArmin Reichold, JAI@Oxford4 Complex & irregular layout and machine: Horizontally and vertically curved sections, (R min >500m) Some sections geometrically straight, others following geoid Sections with significant slopes LC Survey Problem Temp. & pressure gradients in tunnel Very tight space (1m wide) Space serves as emergency escape route  Classical Survey too inaccurate & slow No long-term (>months) stable reference monuments at O(10  m) level  Need frequent surveys  Need automated process  Need regular reference structure  Use regular markers in tunnel wall  transfer coordinates to machine over short distance across tunnel (stake out) HLS Many different section (Linac, BDS, DR, …) Possibly many beam lines

5. 22.06.2005, RHUL, EuroTeV WP7, LiCASArmin Reichold, JAI@Oxford5 LC Survey Problem main beam line Fiducial marker

6. 22.06.2005, RHUL, EuroTeV WP7, LiCASArmin Reichold, JAI@Oxford6 collider component RTRS concept Tunnel Wall Reconstructed tunnel shapes (relative co- ordinates) wall markersinternal FSI external FSISM beam LiCAS technology for automated stake-out process

7. 7 LiCAS Measurement Principle Extrenal FSI System measures Wall marker location Internal FSI System  z. &  x,  y & ,  between cars Straightness Monitor  x,  y & ,  between cars

8. 8 Mech. Tech. Elec. Tech. academic electronic mechanic optic studentic Who works on LiCAS (Oxford team) David Urner Ashley James Cecilia Uribe start: 1.9.05 John Dale start: 1.10.05

9. 22.06.2005, RHUL, EuroTeV WP7, LiCASArmin Reichold, JAI@Oxford9 Oxford: Alumni Robert Apsimon Peter Baker Ken Chuang Edward Botcherby Johannes Prenting Markus Schloesser Ernst-Otto Saemann Daniel Kaempnter Collaborators Thomas Zlosnik Simon Wilshin Chris Glassman Gregorz Grzelak Brtek Szczygiel student David Howell

10. 22.06.2005, RHUL, EuroTeV WP7, LiCASArmin Reichold, JAI@Oxford10 News since the last meeting (11.03.2005)?

11. 11 FSI News Short 6-line FSI system for 3D wall marker measurement works without collimation optics 3D-Piezo Stage Retro Reflector Laser Amplifier Splitter Tree

12. Armin Reichold, JAI@Oxford12 Naked fibre launch for external FSI 50mm Original approach use large Ø collimated beam requires large optics Ø=O(100mm) very costly O(£10k per line) high return fraction > 10 -3 good signal to noise  easy detector and amplifier New approach: use naked angle polished fiber with diverging beam suffer return loss up to 10 -9  1mW in  1pW back develop extremely low noise and low bandwidth (<20 kHz) amplifier high sensitivity detector 420mm required coverage area: 50 x 50 x 50 mm 3 distance to wall: 420mm largest off axis distance that can occur: 32mm

13. 13 Normalised power spectra from naked fibre 35 mm off axis signal no signal

14. 14 Preliminary external FSI results

15. 22.06.2005, RHUL, EuroTeV WP7, LiCASArmin Reichold, JAI@Oxford15 Preliminary conclusion on external FSI Signal clearly visible stray light problem not too dramatic Fourier analysis extremely powerful need more work on accuracy and influence of analysis details need to study large statistical samples need to check tilt angles of retro reflectors

16. 22.06.2005, RHUL, EuroTeV WP7, LiCASArmin Reichold, JAI@Oxford16 More news about FSI systems Internal FSI collimators preliminary ok (first one glued 2 weeks ago) Needs more repeatability work to check thermal behaviour New set of questions about optimum reference interferometer length observed differrences between use of long and short reference interferometer appear to need reference length O(5m) to resolve variations in tuning speed designing folded & evacuated reference interferom. now

17. 22.06.2005, RHUL, EuroTeV WP7, LiCASArmin Reichold, JAI@Oxford17 More news about FSI Completed Masters Projects: calibration of external FSI system displace retro reflector with high precision 3D motion stage while measuring position with FSI lines O(20 position) obtain origins of FSI lines via consistency fitting very good numerical algorithms for geometrical reconstruction can also obtain some parameters of stage metric multiple distance measurements with single FSI line studied minimal resolvable length differences down to 100  m simulated up to 5 distances in one line

18. 22.06.2005, RHUL, EuroTeV WP7, LiCASArmin Reichold, JAI@Oxford18 LSM

19. 22.06.2005, RHUL, EuroTeV WP7, LiCASArmin Reichold, JAI@Oxford19 LSM camera comparison very similar CCD technology

20. 20 LSM camera noise comparison Sony Noise increases with relat. intensity Dolphin Noise decreases with rel. intensity 0 - 0.1250.125-0.250.25-0.375 0.375-0.50.5-0.6250.625-0.75 0.75-0.8250.825-1.0 0 - 0.1250.125-0.250.25-0.375 0.375-0.50.5-0.6250.625-0.75 0.75-0.8250.825-1.0

21. 21 LSM camera comparision The winner is: Sony the cleanest camera

22. 22 LSM fitting and beam finding (Sony) X-coordY-coord X-coordY-coord Narrow (  =1.5mm) beam fitting Wide (  =2.5mm) beam finding Errors in microns for Clean camera, 10-bit realistic “dusty” camera Errors in microns for Clean 8-bit camera Clean 10-bit camera 10  m 100  m

23. 22.06.2005, RHUL, EuroTeV WP7, LiCASArmin Reichold, JAI@Oxford23 LSM fitting Fast algorithm using projections to sides and 2 * 1-D Gaussian fit Many levels of sophistication possible New: evaluate Fourier convolution fitting G(x,y,  0 ) = G(0,0,  0 )   (x,y)  [G(x,y,  0 )] =  [G(0,0,  0 )] *  [  (x,y)] = G’(0,0,  0 -1 ) * [sin(x -1 )+ sin(y -1 )] devide by G’(0,0,  0 -1 ) and back transform ! get  (x,y) that tells you what you want to know! know this, can even generate this for arbitrary beam shape

24. 22.06.2005, RHUL, EuroTeV WP7, LiCASArmin Reichold, JAI@Oxford24 Prototype Production

25. 22.06.2005, RHUL, EuroTeV WP7, LiCASArmin Reichold, JAI@Oxford25 RTRS global Mechanics Measurement car full 3D designs & workshop drawings production schedule finalised Service car full design commerical propulsion system under test in Oxford gathering information for final services routing and power requirements incorporating safety systems service car measurement car

26. 22.06.2005, RHUL, EuroTeV WP7, LiCASArmin Reichold, JAI@Oxford26 LiCAS measurement units Design completed final design review next week task made simpler by dropping collimation optics Invar casts for bodies have arrived precision machining in-house surface treatment commercial cleaning ? vac testing and assembly in house

27. 22.06.2005, RHUL, EuroTeV WP7, LiCASArmin Reichold, JAI@Oxford27 Tunnel preparation 60m long service tunnel at DESY tunnel tests showed walls stable enough installing high speed WLAN installing more interlocks and safety measures ready for use well before RTRS prototype

28. 22.06.2005, RHUL, EuroTeV WP7, LiCASArmin Reichold, JAI@Oxford28 DAQ and Electronics Final custom ADC board single channel performance tests passed nearing completion of firmware O(1 month) Final cutom photodetector & amplifier board: pre-series boards being equipped with parts now green light for serial production in 3 weeks Trigger and Clock distribution system first design completed test prototype in 2 months DAQ software: lab system in C++ to replace initial LabView this month lab system is prototype for train system DAQ and main control

29. 22.06.2005, RHUL, EuroTeV WP7, LiCASArmin Reichold, JAI@Oxford29 What do we do next Up to autumn 2005 Completion of FSI and LSM and global analysis codes Production of Electronics Construction of 3-car prototype components Partial assembly of inner systems at Oxford Sub-system calibrations Installation in DESY test tunnel = 1. Nov. 05

30. 22.06.2005, RHUL, EuroTeV WP7, LiCASArmin Reichold, JAI@Oxford30 What do we do next Up to Spring 2006 Operate prototype at DESY commissioning many calibration programs on full train multiple test surveys of tunnel tuning of operation and analysis algorithms study of systematic errors Up to Spring 2007 In Oxford Improvements of component calibration programs & hardware Design of second generation instrument for X-FEL much smaller  fits into X-FEL tunnel and maybe ATF-2 much simpler  reduce from R&D to production functionality 6 cars Design stake out instrument

31. 22.06.2005, RHUL, EuroTeV WP7, LiCASArmin Reichold, JAI@Oxford31 What do we do next Up to Spring 2008 Operate improved first prototype at DESY Construct second prototype * Operate second prototype in X-FEL * Construct stake out instrument * Operate stake out instrument in X-FEL * *(needs additional funding)