CERN adb Chamber Support Structure Installation MUON SYSTEM INTEGRATION MEETING - Status of Production of support panels - Things to be settled prior to installation - Plans for the Installation of the support panels

2 m 2,4 cm

1,5 m M2 prototype at LNF transport & positioning M2 proto

precision pin glue rivets assembly steps M2 proto

3 panels 4 panels M2 proto

photogrammetry (50  m) in horizontal position of the holes for rivets (our main reference; much better than our needs  0,5 mm) M5 real

Accuracy of Industrial photogrammetry Accuracy of Cospal’s industrial photogrammetry = 1/ (certified by GSI) 8 microns per 1,0 meter of object size Conditions: Photographs: from at least 2 different heights and from varied geometry. Coded targets: 8 or more (we use 14 coded targets). Scale bars: 2 or more (we use 2 scale bars). Observations: each point seen at least 6 times. Plan quality factor: between 1.00 and Image space RMS: < 0.3 micron Scale bar agreement: better than 0.05 mm Point RMS: better than mm in each direction. slide from COSPAL

Accuracy of Industrial photogrammetry The measurement was performed on a 3D- measuring machine, type PM , brand Leitz, at MAN Technologie AG in Ausburg (Germany). This type of measuring machine scans the surface mechanically whit a tip. The machine is installed in an air-conditioned room on a concrete plate which is supported by air bearings for vibration insulation. The measuring error is about 6 micron (absolute). For having a comparison reference on the measurements we have carried out through the photogrammetry system, we have measured one panel using a different measuring system having a better accuracy. Cospal’s photogrammetryRms 54,5 micron MAN 3D-Measuring machine (DEA)Rms 54,2 micron slide from COSPAL

delivery of two half-stations (PS & UZ) at the same time: long term stockage (3 - 4 months) M5 real M5 ready before end November; then two half-stations every two weeks (delivery completed at end of January)

lifting tools prototype design fixation joints

activities before installation SC document under preparation by Alessandro summarizing the calculations done to ensure that the walls and their assembling are adequate for our purpose: panels, connections, fixation joints, chamber supports final lifting system design (structural analysis) resistance verification of lifting system material procurement (all orders sent before middle December) PPSPS under preparation by Alessandro to finalize procedures for a safe assembling in the area transport to the pit of materials and installation tools (January) + working spaces organization

- panels arrival at Bld 156/similar spaces - lifting tools installation in the pit - panels transport to the pit installation sequence 1 panel in vertical position 2 chamber supports fixation 3 grounding copper braid fixation 4 cable supports 5 panel lifting 6 positioning of the following panel 7 gluing & riveting 8 safety electrical soldering (metallic structure) 9 alignment check of some chamber supports (with ruler) next day (glue hardening) less than one working day for each panel: one half-station a week 2 3 4

installation plan for the supporting structure Start cryo side (US) middle January (12/1/6) 2 weeks for the first half-station M5 (16/1-29/1) 1 week for the first M4 half-station (30/1-5/2) 1 week for the first M3 half-station (6/2-12/2) 1 week for the first M2 half-station (13/2-19/2) Switch to pit (PZ) side on March 4 weeks for M5-M2 (20/2-19/3) M1 immediately after