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Installation step 4. (3 days)

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Presentation on theme: "Installation step 4. (3 days)"— Presentation transcript:

1 Installation step 4. (3 days)
B Install temporary support It’s made of 2 halves; the upper one is brought into position through rotation about axis “A” (to avoid risks for the beam pipe) It has 4 flaps (“B”) at ±45º for fixation of beam-pipe and SPD supports prior to transfer their load to ITS Align (survey) temporary support to the beam pipe A

2 Installation step 5. (4 days)
Fix support for beam pipe and FMD (“3rd cone”) to temporary support The 3rd cone is made of two halves containing the FMDs lifting tools allow for slow and accurate positioning of 3rd cone Installation step 5. (4 days) Remove 3rd cone lifting tools Spoke structure reduces material in front of FMDs and allows for visual inspection Test FMDs FMDs have pigtails up to the outer edge of the 3rd cone FMD – Si1 Dummy 3rd cone Lifting tool

3 Installation step 6. (2 days)
Mount and adjust 1st support to the beam pipe Responsibility AT/VAC Survey Mount and adjust monitoring system of bellow movements Responsibility ALICE Non-touching capacitive sensors are proposed Lifting tool

4 Installation step 7. (8 days)
Install the two SPD half-cylinders (Resp. ALICE) Two half cylinder/cones Specific installation tools are being designed SPD services (cables, fibres & capillaries) are pre-assembled in the cones SPD services Section 2 Temporary support Remove section 2 of beam pipe support (Resp. AT/VAC) Fix the two, coupled, SPD half-cylinders to temp. support, above the 3rd cone, using a 2nd series of bolts & precision plugs SPD fixed in cantilever mode to temp. support, SPD pigtails on RB24 side unconnected 3rd cone SPD cone

5 Installation step 8. (7 days)
Slide outer ITS onto SPDs (Responsibility ALICE) Transfer load of SPD and 3rd cone (beam pipe) from temporary support to ITS Connect SDD and SSD on RB26 side Final fixation of SPD pigtails on RB24 side to ITS cone TPC/C4 Temp.Support SPD SDD SSD Mount and adjust 2nd support to the beam pipe (resp. AT/VAC) Survey Outer ITS, SPD & beam pipe are now an integral unit


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