February 12-13, 2006February 12-13, 2006 FCAL Collaboration MeetingFCAL Collaboration MeetingINP INP PANPAN, Kraków, Poland , Kraków, Poland

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LumiCal displacement LumiCal displacement measurement present measurement present statusstatus

Wojciech Wierba IWojciech Wierba INPNP PA PANNJerzy Zachorowski UJJerzy Zachorowski UJ Wojciech Słomiński UJWojciech Słomiński UJ

Leszek Zawiejski INP PAN Leszek Zawiejski INP PAN Krzysztof Oliwa IKrzysztof Oliwa INPNP PA PANN

Michał KarbowiakMichał Karbowiak

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PresentPresent setup – single laser setup – single laser beambeam

BW camera DX1-1394a from Kappa BW camera DX1-1394a from Kappa company 640 x 480 with Sony ICX424ALcompany 640 x 480 with Sony ICX424AL (70€)(70€) sensor 7.4 μm x 7.4 μm unit cell sensor 7.4 μm x 7.4 μm unit cell sizesize

Laser module LDM635/1LT from Roithner Laser module LDM635/1LT from Roithner Lasertechnik Lasertechnik

ThorLabs ½” travel translation stage MT3 ThorLabs ½” travel translation stage MT3 with micrometers (smallest div. 10 μm) with micrometers (smallest div. 10 μm)

Neutral density filters ND2Neutral density filters ND2

February 12-13, 2006February 12-13, 2006 FCAL Collaboration MeetingFCAL Collaboration MeetingINP INP PANPAN, Kraków, Poland , Kraków, Poland

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Single beam setup layoutSingle beam setup layout

February 12-13, 2006February 12-13, 2006 FCAL Collaboration MeetingFCAL Collaboration MeetingINP INP PANPAN, Kraków, Poland , Kraków, Poland

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Single beam measurement Single beam measurement resultsresults I I

1.86

1.88

1.9

1.92

1.94

1.96

1.9 2 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 2.9 3

mm

mm

-2

-1.5

-1

-0.5

0

0.5

1

1.5

2

2.5

4 4.1 4.2 4.3 4.4 4.5 4.6 4.7 4.8 4.9 5mm

Y p

osi

tion

X position X position

Diff

ere

nce

beetw

een p

oin

ts [

μm

]

Camera has been translated in 50 μm ± 2 μm (estimated error) steps

February 12-13, 2006February 12-13, 2006 FCAL Collaboration MeetingFCAL Collaboration MeetingINP INP PANPAN, Kraków, Poland , Kraków, Poland

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Single beam measurement Single beam measurement results IIresults II

X position X position

Diff

ere

nce

betw

een p

oin

ts [

μm

]

Camera has been translated in 50 μm ± 2 μm (estimated error) steps

Diff

ere

nce

betw

een p

oin

ts

[μm

]

Y p

osi

tion

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XYZ displacement XYZ displacement measurement with two measurement with two beamsbeams

Two laser beams (one not perpendicular to the sensor) allows usto measure XYZ translation in one sensor

February 12-13, 2006February 12-13, 2006 FCAL Collaboration MeetingFCAL Collaboration MeetingINP INP PANPAN, Kraków, Poland , Kraków, Poland

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Setup Setup withwith two beams two beams

February 12-13, 2006February 12-13, 2006 FCAL Collaboration MeetingFCAL Collaboration MeetingINP INP PANPAN, Kraków, Poland , Kraków, Poland

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Z translation of the cameraZ 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°

February 12-13, 2006February 12-13, 2006 FCAL Collaboration MeetingFCAL Collaboration MeetingINP INP PANPAN, Kraków, Poland , Kraków, Poland

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Proposed setup with two Proposed setup with two

beams and prism splitterbeams and prism splitter

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Readout electronics for CCD Readout electronics for CCD

PrototypePrototype

February 12-13, 2006February 12-13, 2006 FCAL Collaboration MeetingFCAL Collaboration MeetingINP INP PANPAN, Kraków, Poland , Kraków, Poland

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Readout electronics for CCDReadout electronics for CCDanalog partanalog part

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Readout electronics for CCD Readout electronics for CCD

digital partdigital part

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ConclusionsConclusions

The XY position measurement method The XY position measurement method with single beam has the accuracy with single beam has the accuracy better than a few micrometersbetter than a few micrometers

The different XY algorithm and new The different XY algorithm and new measurements shows similar resultsmeasurements shows similar results

The XYZ position measurement with The XYZ position measurement with two beams looks promising, a new two beams looks promising, a new algorithm has been developed, results algorithm has been developed, results soonsoon

February 12-13, 2006February 12-13, 2006 FCAL Collaboration MeetingFCAL Collaboration MeetingINP INP PANPAN, Kraków, Poland , Kraków, Poland

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Next stepsNext steps

New lasers with aspherical lenses – better spotNew lasers with aspherical lenses – better spot Beam splitter with half transparent mirror – Beam splitter with half transparent mirror –

designed, not ordered yetdesigned, not ordered yet Setup with two lasers – better reliabilitySetup with two lasers – better reliability Improvement of algorithm to determine centre Improvement of algorithm to determine centre

of two spotsof two spots Discussion on possible errorsDiscussion on possible errors More compact prototype – in progressMore compact prototype – in progress Independent measurement of XYZ translations Independent measurement of XYZ translations

– Renishaw industrial system (0.1 – Renishaw industrial system (0.1 μm μm resolution)resolution)

Stability tests Stability tests