1. ALICE TC meeting – 28.05.2010 Plans for the next technical stop
A. Tauro

2. Technical issues, planning
News --
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Technical issues, planning

3. Technical issues, planning
Last interventions
No access since last Friday
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Technical issues, planning

4. Technical issues, planning
Next LHC stops
Next LHC technical stop May 31st-June 2nd
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Technical issues, planning
K.Foraz

5. Technical issues, planning
LHC stop 31 May, 1-2 June 1/4
Schedule for the access:
RP search: Mon 8:00 – 9:00
Start cavern access: Mon 9:00 (except L3, Dipole and muon side)
Ramp down L3 and dipole: Mon afternoon
RP search L3: Tue 9:30
Access into L3 starts Tue at 9:30
No access into dipole (no requests)
Mon starting at 6:00 AM: optimization dipole and solenoid cooling: magnets stay on till end of test
Increasing cooling water temperature of +2°C and, eventually, +4°C
Consequently, the temperature inside L3-Dipole might change on Mon
Restore old settings on Mon afternoon
Detectors SHOULD stay on during the day
TC Meeting
Technical issues, planning

6. Technical issues, planning
LHC stop 31 May, 1-2 June 2/4
Cavern interventions:
TOF, Muon TRG, EMC, TPC and SPD: see slides
EN-CV: see presentation from Pierre
Platform above SPD cooling unit (Didier) + scaffolding (Ouvaroff, Mon 9:00)
TOF crates protections (Pieter, Samuel, Fred)
Flowmeter in mixed water line (C-side) (Philippe) + modification timing of L3 water valves (Dominique + Philippe)
ACO: electronics intervention (30-40 minutes) in rack (level 4, side O). Mon as early as possible
RP (Mon 9:15): 2 water samples (TRD, SSD) + 1 C4F10 (Isabel B. + Pierre B.). The results of gamma spectrometry might not be available before Tue AM
PMD: access to the detector to investigate cooling improvement. Tue
Charles Henri + firemen: Wed PM (L3)
Borge (laser): check laser high voltage and energy output. Take some mechanical measures for future reference. About 1 hour Wed PM
PHOS (A. Vinogradov): reset LED VME crate
TC Meeting
Technical issues, planning

7. Technical issues, planning
LHC stop 31 May, 1-2 June 3/4
Cavern interventions (cont):
Marc: confined space course: Wed PM (L3)
ASN: cleaning toilettes UX-25 (Mon PM)
TC Meeting
Technical issues, planning

8. Technical issues, planning
LHC stop 31 May, 1-2 June 4/4
Other activities
DAQ: see slide
DCS: see slide
TE-EPC: test new setting (threshold) on L3 power converter
L3 must be ramped up/down/up on Wed PM
Installation public address system in ACR (Tue)
CV: measurements T,P inside ITS dehumidifier in CR5. Tue at 14:00
STOP plant for ~2 hours
CV: measurements pressure and flow L3 ventilation unit. Fri 28th 10:00
Unit might be stopped 10’
CV: maintenance pumps PX24 (mixed-water) + various interventions
Nothing will be stopped
TC Meeting
Technical issues, planning

9. Muon Trigger Configuration & Readout problem (Right Side)
Readout problems Right side, initially in column 1 Right (see picture of pulser evnt)
Other configuration problems (Masks, LUT) of MTR electronics Right side
=> MTR right side is not operational since Friday, May 21rst
=> Clock distribution Right side ?
Access to cavern
P. Dupieux, YW. Baek, Monday May 31rst, from morning on
Other access needed on Tuesday or Wednesday if problem is not fixed on Monday (+ Ch. Renard, J.L. Beney)
Access area and needs
Below Muon platform and upper gangway
No need for nacelle nor scaffoldings
TC Meeting
Technical issues, planning 9 9

10. Technical issues, planning
~ 5.5 m
~ 6.5 m
RPC MT11_OUTSIDE9:
Frequent, sudden HV trips since May, 24
We suspect bad HV connection
(need to check whether it is on the cable or chamber side)
Access to cavern: 3 people (M. Gagliardi, A.Piccotti, P. Mereu) on Monday afternoon as soon as dipole is off.
Possibly, need for further access on Tuesday.
Access area and needs: muon platform Outside; need scaffolding IP
TC Meeting
Technical issues, planning 10

11. TOF interventions during the technical
stop (31 May – 2 June)
- DC-DCs to be replaced:
SM00 – crate 02 – C side
SM05 – crate 20, 21, 22 – A/C side
SM07 – crate 28 (29 to be checked) – A side
N.B.: to replace the DC-DC in crate 28 it’s needed to move the SM.
- LV channels to be changed (into spare ones):
SM00 – crate 00 – CH01 - A side
SM02 – crate 08 – CH02 - A side
SM02 – crate 10 – CH02 – C side
SM03 – crate 12 – CH01 – A side
SM11 – crate 46 – CH01 – C side
SM13 – crate 53 – CH02 – A side
SM16 – crate 66 – CH06 - C side
- HV channel:
SM14 – M1 (neg) to be checked – A side
TOTAL: 5/6 DC-DCs
TOTAL: 7 LV channels
TC Meeting
Technical issues, planning

12. Technical issues, planning
TOF people involved during the intervention:
- To move SM07: 6
Gilda Scioli
Andrea Alici
Daniele De Gruttola
Rosario Nania
Anselmo Margotti
Michele Furini
- To change the other DC-DCs:
4 inside L3
1 watcher
1 in ACR
TC Meeting
Technical issues, planning

13. Technical issues, planning
EMCAL plans
Swap an RCU+DCS board (Terry). This board started to give CDH errors at a low rate over the last weeks. It became worse recently and has been taken out the EMCal readout, disabling the readout of 1/2 of a SM (1/8 of installed EMCal acceptance). This will be a few hours work to replace and test. It's located on the A-side of EMCal.
Repair a TRU trigger unit board (Jiri) on the C-side (1 of 12 installed). This was recovered during the last access, but it didn't remain long without problems. This would similarly be an access of a few hours.
TC Meeting
Technical issues, planning

14. Technical issues, planning
TPC plans
1. Displacement of a crate from a rack to the adjacent one in the C area:
we estimate this activity will take about 4 hours;
people involved: L. Musa, A. Junique, S. Rambaut.
2. Replacement of 1 FECc in sector A00 (rp5, br B, FEC 0):
we estimate this activity will take 1/2 day
people involved: A. Junique, S. Rambaut, Y. Lesenechal.
TC Meeting
Technical issues, planning

15. Technical issues, planning
TRD plans
Access to TRD switches in I08, O08, C17,C18:
check of switch status and cabling (especially I-side switches) review space, cable length etc. for eventually moving C switches to C19. Two persons in Cavern for 1 hour
Measure LV at SM bus bars (inside L3 - sector 07, C-side)
LV readings close to acceptable minimum
Two persons in L3 for 30 min. on Wed
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Technical issues, planning

16. Technical issues, planning
SPD plans
Monday 31/05/2010
9 – 12: access to the cavern + RP cooling procedure (EN-CV)
fill up the bottle with new freon (Claudio)
14 – 18: put the plant in safe mode (STOP + lines locked) and replace the freon
Tuesday 01/06/2010
9 – 12: get to PP4 (ASAP) to replace the filters, close and vacuum the loops
14 – 18: ● quick leak test ● restart the plant and re-tuning of flow with new filters
18 – onwards: restart the detector
Wednesday 02/06/2010
9 – 17: Operation on the plant in case of problems, delays or fine tuning
TC Meeting
Technical issues, planning

17. Technical issues, planning
DAQ activities
DAQ activities on Monday :
9hrs: DATE software upgrade (reboot of all machines, also ACR)
Afterwards: ACR PCs are available but the DAQ will not, due to further maintenance issues:
During the day: EDM test with Technical Runs
16 hrs: FiberChannel Switch exchange (GDC interruption)
20 hrs: ACR PC Linux version change (transparent change to users, no interruption, no reboot)
DAQ fully available again before midnight.
TC Meeting
Technical issues, planning

18. Technical issues, planning
DCS activities
DB maintenance
1hr on Monday morning, no impact
3hr on Tuesday morning, no configuration, archiving to disks
Updates and rebalancing on various PVSS and Operating systems, short interruptions due to project restarts or PC reboots
Update on central console and interface, 2hrs, console should be made available on other screens
Implementation and test of supersafe datapoint (will need test with all relevant detectors)
DSS upgrade and backup, no impact on DSS itself (DSS screen unavailable in ACR during few minutes)
TC Meeting
Technical issues, planning

19. ALICE integration progress
TRD infrastructure (top modules)……………… Raw material delivered to P2
Welding started (done in 1 week)
Assembly started (Didier)
Completed end July
Test (with module) in September
Miniframe suspension tool……………………… Design completed
Fabrication drawings done
Delphi frame (new support)………………...… Design completed
Procurement and fabrication (Yannick)
Delphi frame (table)……………………………… Design May-June
To be sent to Simonetti
TC Meeting
Technical issues, planning

20. Technical issues, planning
ALICE visits
VIP (expo and UX-25)
May 31st 11:00 to 12:00: 5 people from Huazhong Normal University, Wuhan
May 31st PM: Dr. Rakesh Bhandari, Director, VECC (T.Nayak)
Non VIP (expo and ACR)
May 28th and 29th a group of ~70 students in Physics from University of Torino (M. Masera)
TC Meeting
Technical issues, planning

21. Technical issues, planning
AOB
Maintenance cranes: June (W22 to W26)
ADI problem (requestor/Donneur d’ordre of the document has to be staff member)
Next release will be deployed the first weekend of June (5th – 6th of June)
Regular cleaning CR1-4 restored
Test sirens: 7:00 to 8:00 Tue 1st June
Maintenance UX-25 lift (AS703): 7:30 to 9:30 Tue 1st June (delegation to CCC?)
Replacement speed regulator UX-25 lift (AS703)
Wed 30 June 6:00 to 13:00 – lift unavailable
Next confined space course on Wed 2nd June 13:30 P2
Next TC meeting: Friday 18th June at 9:00
TC Meeting
Technical issues, planning