2011-12 winter shutdown preparatory meeting

1. 2011-12 winter shutdown preparatory meeting A.Tauro 04-11-2011 ALICE 2011-12 winter shutdown schedule - A.Tauro

2. V0.1 2011-12 winter shutdown • Shielding TRD Shielding EMC Close L3 Open L3 TRD infrastructure EMC infrastructure Beam off: Dec 8th at 6:00 AM Beam on: Mar 7th at 18:00 PM CERN closure: 22/12 to 4/1 included ALICE 2011-12 winter shutdown schedule - A.Tauro

3. UX25 access restrictions Close L3 Open L3 Access restrictions: Removal/installation of shielding (restriction includes RB24 triplets) • PX24 blocks: no access CR5 and UX25 • PX24 beams (35t): no access CR1-5, Expo, and UX-25 • All other blocks: no access to UX-25 (or 1-2 teams max, not on A-side) TRD insertion: no access to MNF AUG test (Arrêt Urgence General – General Emergency Stop) – no access UX25 DSO test (Department Safety Officer) – no access UX25 No access SX2 during manipulation of blocks in SX2 (except ACR and WRs) ALICE 2011-12 winter shutdown schedule - A.Tauro

4. L3 and MNF access restrictions Close L3 Open L3 • Wks 49-50 and 7: access in normal hours (e.g. TPC) to be coordinated with TC • Wks 1-2: no access inside L3 during TRD SMs insertion • When moving from low-beta to insertion platform: no access to MNF • When inserting the module: no access L3 and MNF • Watcher needed in wks 49-50 and from wk 6 onwards ALICE 2011-12 winter shutdown schedule - A.Tauro

5. TE-VSC • 8th and 9th Dec: close MNF valve and venting central beampipe • Feb 1st– 23rd: pump down central beampipe ALICE 2011-12 winter shutdown schedule - A.Tauro

6. GS-ASE • Week 52: evacuation test • Nothing foreseen on PAD/MAD ALICE 2011-12 winter shutdown schedule - A.Tauro

7. EN-CV-OP – Dec • 8th Dec: adjustment flow of chilled-water in the cavern • Will affect all cooling plants • Keep as many detectors on (24h), in order to check that regulation works (EN-CV-DC side) • Week 50: rinsing of mixed water in UX25 cavern (Philippe) • Refilling in parallel  will not affect ALICE cooling • End wk 50 (16th Dec): test of Dipole flooding alarm • Need access to Dipole (Philippe) ALICE 2011-12 winter shutdown schedule - A.Tauro

8. EN-CV-OP – Jan/Feb • Thu 5th and Fri 6th Jan:maintenance PMD-MTG-MTK ventilation units • Fri 6th Jan: stop chilled water (SU2) • Therefore stop mixed water (cavern, CRs) • Switch tap water into CRs • Week 2: • Cleaning cooling towers (Mon to Thu) • Maintenance L3 injection and UX25 extraction/injection units. Test of alarms • Modification of chilled water pipe for L3 jacket (Mon) • Maintenance mixed water pumps PX24 (Mon-Wed) and UW25 (Wed-Thu) • Preparation services new ITS dehumidifier • Consolidation of automatic switchover to tap water into CRs • Week 3: • Restart chilled & mixed water (around Wed, tbc) • Maintenance L3 extraction unit. Test of alarms • Maintenance ITS (old) ventilator in CR5 • Maintenance ventilation unit SG2 (Mon-Tue) ALICE 2011-12 winter shutdown schedule - A.Tauro

9. EN-CV-OP – pending • Repair leak FB pipe: 1 day (compensatory measures tbd) • Removal unused FB pipe (I-side). 1 day (need nacelle) ALICE 2011-12 winter shutdown schedule - A.Tauro

10. EN-EL • Week 49 or 50 (tbd): • Test general secours: stop general services for 10’ • To be coordinated with VAC team (to not disturb BP venting) • 17/12: Test auto-transfert: • 1.5 days to configure + 1 day test • No impact on experiments • Consolidation 48V network (after incident 11th Jan 2011) • 1 day no access to UX25 • Saturday 7th Jan (tbc) • Thu 12th Jan (tbc): maintenance power transformers: • Will cut EXD1/2X for 3h  cut power to CRs (normal network) • Will cut ITS ventilator and HMPID rack in CR5 • Test AUG P2: Fri Jan 13th – No access UX25 • Major electrical perturbation affecting P2 for whole day • Maintenance power transformer EMT306/2X. Wed 25th Jan • Will stop UX25 air extraction and injection (4h) – impact on access to be seen (Fernando) ALICE 2011-12 winter shutdown schedule - A.Tauro

11. EN-CV-BE • New ITS dehumidifier unit in SX2 • Installation of air duct (SPIE) from SX2 to CR5 • Connection to chilled water (Iniziative) ALICE 2011-12 winter shutdown schedule - A.Tauro

12. EN-CV-DC • RP sampling: Dec 8th • SDD-SSD. Replacement pump: plant stopped 1 day on Dec 16th • TOF-PHOS-EMC-SPD. Replacement flowmeter + fix leak: plant stopped 1 day between Dec 19th and 21st • TOF-PHOS-EMC-SPD. Installation PHOS circulator + periodic maintenance: plant stopped from 5th to 12th Jan • SPD. Periodic maintenance + put entire plant on UPS: plant stopped 1 day on Jan 6th • TRD. Periodic maintenance + preventive replacement pump: plant stopped 2 days on Jan 16th and 17thAsked to be anticipated to week 2 • TPC. Periodic maintenance + preventive replacement pump + include heaters in supervision: pant stopped from 18th to 20th Jan • HMPID. Periodic maintenance + preventive replacement pump + level transmitter: plant stopped 2 days on Jan 23rd and 24th • TPC RR. Periodic maintenance + install new filters: plant stopped from Jan 25th to Feb 2nd • SDD-SSD. Periodic maintenance + calibration safety valves (tbc): plant stopped from 3rd to 7th Feb ALICE 2011-12 winter shutdown schedule - A.Tauro

13. BE-ABP-SU (survey) • With L3 doors open, requiring one full day before Xmas (preferably on Sat w50): • Zero measurement (SF, TPC feet, MNF valve, MNF) • Low Beta network update • C-side photogrammetry (EMCal) • After each TRD insertion, requiring 2h inside MNF : • MNF valve and MNF, requiring 2h inside MNF • At the end of TRD and EMCal, requiring three full days with both doors open: • TRD modules, CAL frame photogrammetry, MNF valve, MNF, SF deformation, TPC feet • Muon ST2 survey needed ALICE 2011-12 winter shutdown schedule - A.Tauro

14. DAQ-DCS • DAQ shutdown 21st Dec mid-day • DAQ start after cooling and power interventions, end wk 3 • Arrangements for individual LDCs can be organized (send a mail to alice-datesupport@cern.ch) • DCS: keep running during Christmas • Replace PCs weeks 1-2-3-4 • Replacement CR3 racks and removal air conditioning CR2-3-4 • From week 4 ALICE 2011-12 winter shutdown schedule - A.Tauro

15. TPC • Take out capacitors ALICE 2011-12 winter shutdown schedule - A.Tauro

16. TPC laser • Annual laser maintenance, 1-2 days. Needs normal power and cooling • Open mirror box below TPC sector A13 (bottom below TPC endplate) and possibly replace camera or mirror. 1-2 days. I want to do this because a weak picture from this mirror/camera makes C-side alignment difficult. Best done with L3 doors open. I believe access between the TOF and TPC should be OK. I need to be able to run the laser, so we need to mount the long laser pipe temporarily after opening of L3 doors. ALICE 2011-12 winter shutdown schedule - A.Tauro

17. PHOS • As from Dec 8th (PM): • Fix condensation problem on pipes and on top of detector • New redundant power supply for crystal cooling unit • Flowmeter crystal cooling unit (tbc) • 2 new T sensors inside L3 • Replace RCU_0 in module_3 • Connect crystal plant and LVPS to FB water during cooling stoppage: • E.g. on Jan 5th ALICE 2011-12 winter shutdown schedule - A.Tauro

18. MTK • Replacement of chambers with spare ones • Checking Bus - patch and other Electrical Connections • Minor mechanical corrections and adjustments • Possible changes in CROCUS, if any • We shall need electrical meters, tools, light, laptop and a small ladder inside the FASS during our work. Mamu will meet you after 12th november, and then a detailed ADI [with dates and names of persons] will be submitted for approval ALICE 2011-12 winter shutdown schedule - A.Tauro

19. MTG • Front-end Electronics: maintenance (spare installation mostly) • 1 week (including validation tests). Nacelle needed • Survey of 2 half-planes (MT12-IN and MT12-OUT) including measurements withtheodolite and photogrammetry, survey of the other 6 half-planes with only theodolite measurements • 1 week. Nacelle needed • General check of gas leakage to be performed after all the other activities • 1 week. Nacelle needed • Tests in-situ for speeding up the configuration of the Regional electronics • 2 days ALICE 2011-12 winter shutdown schedule - A.Tauro

20. ZDC • Move detectors by 1.36m towards IP to solve the problem of collimator shadow ALICE 2011-12 winter shutdown schedule - A.Tauro

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22. Status of gas systemsduring Christmas period • MTR Ar backup • MCH  CO2 backup • PMD  Arbackup • TOF  C2H2F4 backup ? • TRD  On. Will needabout 40 m3 of CO2 for flushing 3 new TRD SMs • TPC  On • PHO  N2 flushing • HMP  Arbackup inletflushing ALICE 2011-12 winter shutdown schedule - A.Tauro

23. Other activities • Release all TOF crates supports and Decoupling TPC-Space-Frame • Disconnect/reconnect SPD pipes • Modification BBF (EMCal access) • Install C-side ladder + trap • Picture ALICE (A.Saba). End of Jan - beginning of Feb ALICE 2011-12 winter shutdown schedule - A.Tauro

24. Visits • Group of Italian students (42 students + 4 teachers) • 19th Jan (tbc). Contact: C.Bortolin ALICE 2011-12 winter shutdown schedule - A.Tauro

25. AOB • P2 shuttle to be prolonged till Fri 16th Dec ALICE 2011-12 winter shutdown schedule - A.Tauro