1. February 12-13, 2006FCAL Collaboration Meeting INP PAN, Kraków, Poland 1 LumiCal displacement measurement present status Wojciech Wierba INP PAN Jerzy Zachorowski UJ Wojciech Słomiński UJ Leszek Zawiejski INP PAN Krzysztof Oliwa INP PAN Michał Karbowiak

2. February 12-13, 2006FCAL Collaboration Meeting INP PAN, Kraków, Poland 2 Present setup – single laser beam BW camera DX1-1394a from Kappa company 640 x 480 with Sony ICX424AL (70€) sensor 7.4 μm x 7.4 μm unit cell size BW camera DX1-1394a from Kappa company 640 x 480 with Sony ICX424AL (70€) sensor 7.4 μm x 7.4 μm unit cell size Laser module LDM635/1LT from Roithner Lasertechnik Laser module LDM635/1LT from Roithner Lasertechnik ThorLabs ½” travel translation stage MT3 with micrometers (smallest div. 10 μm) ThorLabs ½” travel translation stage MT3 with micrometers (smallest div. 10 μm) Neutral density filters ND2 Neutral density filters ND2

3. February 12-13, 2006FCAL Collaboration Meeting INP PAN, Kraków, Poland 3 Single beam setup layout

4. February 12-13, 2006FCAL Collaboration Meeting INP PAN, Kraków, Poland 4 Single beam measurement results I Y position X position Difference beetween points [μm] Camera has been translated in 50 μm ± 2 μm (estimated error) steps

5. February 12-13, 2006FCAL Collaboration Meeting INP PAN, Kraków, Poland 5 Single beam measurement results II X position Difference between points [μm] Camera has been translated in 50 μm ± 2 μm (estimated error) steps Difference between points [μm] Y position

6. February 12-13, 2006FCAL Collaboration Meeting INP PAN, Kraków, Poland 6 XYZ displacement measurement with two beams Two laser beams (one not perpendicular to the sensor) allows us to measure XYZ translation in one sensor

7. February 12-13, 2006FCAL Collaboration Meeting INP PAN, Kraków, Poland 7 Setup with two beams

8. February 12-13, 2006FCAL Collaboration Meeting INP PAN, Kraków, Poland 8 Z translation of the camera Z = 0 μm Z = 250 μm Z = 500 μm Z = 750 μm Z = 1000 μm Z = 1250 μm Z = 1500 μm X and Y position are constant The angle between two beams is ~30°

9. February 12-13, 2006FCAL Collaboration Meeting INP PAN, Kraków, Poland 9 Proposed setup with two beams and prism splitter

10. February 12-13, 2006FCAL Collaboration Meeting INP PAN, Kraków, Poland 10 Readout electronics for CCD Prototype

11. February 12-13, 2006FCAL Collaboration Meeting INP PAN, Kraków, Poland 11 Readout electronics for CCD analog part

12. February 12-13, 2006FCAL Collaboration Meeting INP PAN, Kraków, Poland 12 Readout electronics for CCD digital part

13. February 12-13, 2006FCAL Collaboration Meeting INP PAN, Kraków, Poland 13 Conclusions The XY position measurement method with single beam has the accuracy better than a few micrometers The XY position measurement method with single beam has the accuracy better than a few micrometers The different XY algorithm and new measurements shows similar results The different XY algorithm and new measurements shows similar results The XYZ position measurement with two beams looks promising, a new algorithm has been developed, results soon The XYZ position measurement with two beams looks promising, a new algorithm has been developed, results soon

14. February 12-13, 2006FCAL Collaboration Meeting INP PAN, Kraków, Poland 14 Next steps New lasers with aspherical lenses – better spot New lasers with aspherical lenses – better spot Beam splitter with half transparent mirror – designed, not ordered yet Beam splitter with half transparent mirror – designed, not ordered yet Setup with two lasers – better reliability Setup with two lasers – better reliability Improvement of algorithm to determine centre of two spots Improvement of algorithm to determine centre of two spots Discussion on possible errors Discussion on possible errors More compact prototype – in progress More compact prototype – in progress Independent measurement of XYZ translations – Renishaw industrial system (0.1 μm resolution) Independent measurement of XYZ translations – Renishaw industrial system (0.1 μm resolution) Stability tests Stability tests