19 January 2006 VELO installation

Eddy Jans 1

VELO-installation meetingCERN, January 17, 2006

• preparation IP8-area• photogrammetry @ SX8• moving SX8 -> IP8• alignment @ IP8• UXA-C3 platform• cables• planning

19 January 2006 VELO installation

Eddy Jans 2

preparation IP8-area

• 4 bolts for skates will only be bolted not bolted & glued.

• height needed for hook of crane ??• install crane.

• we drill holes for consoles for service platform and for LV- and HV-boxes.• differential circuit breakers -> interaction with magnet ON, i.e., problems with regular 220 V.• ≤1 cm of surface of concrete console can be used for egalisation. Correct ??• cleaned and painted.• beam lines on floor and wall. What length + more lines needed ??•TL-illumination

19 January 2006 VELO installation

Eddy Jans 3

photogrammetry @ SX8

Centre FrameFiducial Marks• 2.5 m free space needed on each side

of VELO-tank• NIKHEF levels setup on floor• photogrammetry uses 5 fiducial points on each side of center frame

• NIKHEF makes extensions for spheres from 3 -> 20 mm

19 January 2006 VELO installation

Eddy Jans 4

photogrammetry @ SX8

SHELL GAUGE

Determine detector positionsvia 8 reference points on theoutside.

19 January 2006 VELO installation

Eddy Jans 5

moving VELO SX8 -> IP8

19 January 2006 VELO installation

Eddy Jans 6

moving VELO SX8 -> IP8

RICH1

magnet

magnet

Send actual VELO-dimensions (without hoods) to Olivier Jamet.

19 January 2006 VELO installation

Eddy Jans 7

moving VELO SX8 -> IP8

19 January 2006 VELO installation

Eddy Jans 8

alignment @ IP8

• first RICH1 needs to be put back• rough positioning by NIKHEF by means of beam lines on floor and walls• precise alignment by CERN with theodolites:

x = y = z = 0.5 mm (1) = 0.1 mrad in polar angle

• nominal position of detectors inside is based on reference marks on the outside of the tank. This procedure requires rapid conversion and feedback, i.e. preparation beforehand.

19 January 2006 VELO installation

Eddy Jans 9

UXA-C3 platform

• layout in EDMS 679336• cable trays arrive at the top• do the cables enter PLC racks from top/bottom ?? • how about Adriana’s rack ??• dimensions chiller racks ??• lekbak needed under chillers.

19 January 2006 VELO installation

Eddy Jans 10

cables

top view

front view

• extra duck in existing trays by middle of March• cable order needs to be checked• pull cables a.s.a.p.

19 January 2006 VELO installation

Eddy Jans 11

planning• all IP-8 preparations done or almost done before we decide to move• arrival of VELO-setup @ CERN defines t=0• dismantling @ NIKHEF starts at t=-3 weeks• positioning and photogrammetry @ SX8 takes 1 week• going 100 m down + pass behind magnet to IP8 takes 1 week• put back RICH1 + rough positioning takes 1 week• install dust covers• iterative alignment procedure with theodolites takes 1 week• installation of pumps, pipes, power, etc. can then start• installation of service platform foreseen around mid April• when the mounting of connectors can start depends on pulling of cables.

final schedule will be made in the course of next week by Rolf Lindner after news from exit foil + beam pipe.

in present preliminary schedule t=0 is on Wednesday March 15 -> start packing at NIKHEF on Wednesday February 22 -> 4.5 weeks left for testing at NIKHEF