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