1. Shutdown conclusion, LS1 and LS2 planning - A.Tauro
DCal meeting
15/3/12
Shutdown conclusion, LS1 and LS2 planning - A.Tauro

2. Shutdown conclusion, LS1 and LS2 planning - A.Tauro
LS1 plans
LS1 will start towards end November 2012 (week 48) and will last for approximately 18 to 20 months (i.e. till July 2014). Let’s suppose 19 months: this corresponds to 83 weeks
Baseline plan (if SPD cooling problem fixed in 2011/12):
Add 5 TRD modules
Add 6 (or 8) DCal modules
Add 1 PHOS module
Plan B.1: ITS consolidation (get PP3 access to remove SPD filters):
Baseline + remove MNF and displace TPC
Plan B.2: SPD repair:
Baseline + remove MNF, displace TPC, and remove SPD detector
15/3/12
Shutdown conclusion, LS1 and LS2 planning - A.Tauro

3. Baseline plan Miniframe removal vs. suspension
Should we remove the MNF in LS1?
Reminder: we can carry out LS1 plan without removing the MNF:
Bottom TRD modules  MNF suspension.
DCal installation  MNF in place.
MNF removal: pros
cons
Better TPC accessibility A-side.
L3 totally free on the A-side (easier manipulation of PHOS-DCal cradles and DCal rails).
Disconnect TPC/ITS services in PP0 and PP1.
TPC and ITS re-commissioning lengthy.
Remove RB24 beampipe and compensator magnet.
Forward detectors stay in place (but for PMD)
15/3/12
Shutdown conclusion, LS1 and LS2 planning - A.Tauro

4. Baseline plan Miniframe removal vs. suspension
Both the removal/reinstallation and the suspension are quite delicate operations.
We have already gone through both of them in the past. Last year we have improved the MNF suspension tool and tested it on the surface, with a new hydraulic system.
The overhead of PP0 & PP1 disconnection / reconnection is considerable, and the time to re-commission the detector is unpredictable (bug fixes, broken fibers,…)
Conclusion: we do not plan to remove the MNF in LS1.
15/3/12
Shutdown conclusion, LS1 and LS2 planning - A.Tauro

5. Shutdown conclusion, LS1 and LS2 planning - A.Tauro
Baseline plan
Remove plug, mobile shielding, open doors 2
Remove PHOS, cradle, rails 4
Install DCAL Rails & Cradle
Concrete walls & TRD installation frame 1.5
TRD 4/5 (top) & counterweights
Suspend Miniframe
TRD 12/13/14 with yellow platform (bottom) 2
‘Un-suspend’ Miniframe
Install 6 (or 8) DCAL modules 4
Install 4 PHOS modules 2
Close plug, mobile shielding
Contingency
32 weeks
PHOS & DCAL services in parallel
Removal and reinstallation of V0/PMD; removal and reinstallation of compensator magnet; removal, reinstallation and bakeout of RB24 beampipe and ‘consolidation’ are in parallel.
15/3/12
Shutdown conclusion, LS1 and LS2 planning - A.Tauro

6. Shutdown conclusion, LS1 and LS2 planning - A.Tauro
Nominal DCal extension
SuperModule
DCAL
Tiers de SuperModule DCAL
PHOS
CPV
SuperModule
DCAL
Amount of subsystems:
4 modules PHOS + CPV
6 SuperModules DCAL
2 Tiers de SuperModules DCAL
Amount of DCAL modules:
SuperModule DCAL 6x12x16=1152
Tiers de SuperModule DCAL 2x4x24=192
Total 1344 modules DCAL
15/3/12
Shutdown conclusion, LS1 and LS2 planning - A.Tauro

7. Shutdown conclusion, LS1 and LS2 planning - A.Tauro
Alternative DCal extension
SuperModule
DCAL
SuperModule
DCAL Central
PHOS
CPV
SuperModule
DCAL
Amount of subsystems:
4 modules PHOS
6 SuperModules DCAL
1 SuperModule DCAL Central
Amount of DCAL modules :
SuperModule DCAL 6x12x16=1152
SuperModule DCAL Central 1x12x16=192
Total 1344 modules DCAL
15/3/12
Shutdown conclusion, LS1 and LS2 planning - A.Tauro

8. Shutdown conclusion, LS1 and LS2 planning - A.Tauro
Alternative DCal extension : central supermodule conceptual design
Vue axo DCal Central, phi = 0°, 20°
Vue axo DCal Central phi = 40°
DCal modules amount :
Tiers de SuperModule DCAL 2x4x24=192
SuperModule DCAL Central 1x12x16=192
15/3/12
Shutdown conclusion, LS1 and LS2 planning - A.Tauro
Vue de profil

9. 2012 ALICE setup
3/5 PHOS
13/18 TRD
18/18 TOF
7/7 HMPID
12/12 EMCAL 2x 2x 2x 4 5 3 2x 6 2 7 1 2x 8 9 2x 17 10 16 11 15 12 14 13 4 1 3 2
TRD module with hole

10. ALICE setup after LS1
4/5 PHOS
18/18 TRD
18/18 TOF
7/7 HMPID
12/12 EMCAL
6/6 DCal 2x 2x 2x 4 5 3 2x 6 2 7 1 2x 8 9 2x 17 10 16 11 15 12 14 13 4 1 3 2
TRD module with hole