2011-12 winter shutdown preparatory meeting

ALICE 2011-12 winter shutdown schedule - A.Tauro

2011-12 winter shutdown preparatory meeting

A.Tauro04-11-2011

4/11/11


Dec Jan Feb Mar

Wk 49 50 51 52 1 2 3 4 5 6 7 8 9 10

Mo 5 12 19 26 2 9 16 23 30 6 13 20 27 5

Tu

We

Th

Fr

Sa

Su Xmas Day NY Day

2011-12 winter shutdown

4/11/11

Shielding TRDEMC

Shielding

Close L3Open L3

V0.1

TRD infrastructure

EMCinfrastructure

Beam off: Dec 8th at 6:00 AMBeam on: Mar 7th at 18:00 PM

CERN closure: 22/12 to 4/1 included

4/11/11 ALICE 2011-12 winter shutdown schedule - A.Tauro

UX25 access restrictions

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 MNFAUG test (Arrêt Urgence General – General Emergency Stop) – no access UX25DSO test (Department Safety Officer) – no access UX25

No access SX2 during manipulation of blocks in SX2 (except ACR and WRs)

Dec Jan Feb Mar

Wk 49 50 51 52 1 2 3 4 5 6 7 8 9 10

Mo 5

After 18:00

19 26 2 9 16 23 30 6

After 18:00

20 27 5

Tu

We

Th

After 18:00

Fr

AUG

Sa

DSO

Su Xmas Day NY Day

Close L3Open L3


Wks 49-50 and 7: access in normal hours (e.g. TPC) to be coordinated with TCWks 1-2: no access inside L3 during TRD SMs insertion

When moving from low-beta to insertion platform: no access to MNFWhen inserting the module: no access L3 and MNF

Watcher needed in wks 49-50 and from wk 6 onwards

L3 and MNF access restrictions

Dec Jan Feb Mar

Wk 49 50 51 52 1 2 3 4 5 6 7 8 9 10

Mo 5

After 18:00

19 26 2 9 16 23 30 No ventilation

After 18:00

20 27 5

Tu

We

Th

After 18:00

Fr No ventilation

AUG

Sa

DSO

Su Xmas Day NY Day

Close L3Open L3

TE-VSC

• 8th and 9th Dec: close MNF valve and venting central beampipe• Feb 1st – 23rd: pump down central beampipe


GS-ASE

• Week 52: evacuation test• Nothing foreseen on PAD/MAD


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)


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)


EN-CV-OP – pending

• Repair leak FB pipe: 1 day (compensatory measures tbd)• Removal unused FB pipe (I-side). 1 day (need nacelle)


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)


EN-CV-BE

• New ITS dehumidifier unit in SX2– Installation of air duct (SPIE) from SX2 to CR5– Connection to chilled water (Iniziative)


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 17th Asked 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



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

4/11/11

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 [email protected])

• 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


mailto:[email protected]



TPC

• Take out capacitors


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.


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


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


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 with theodolite 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


ZDC

• Move detectors by 1.36m towards IP to solve the problem of collimator shadow


---


Status of gas systemsduring Christmas period

• MTR Ar backup• MCH CO2 backup • PMD Ar backup • TOF C2H2F4 backup ? • TRD On. Will need about 40 m3 of CO2 for

flushing 3 new TRD SMs• TPC On • PHO N2 flushing• HMP Ar backup inlet flushing



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

4/11/11

Visits

• Group of Italian students (42 students + 4 teachers)– 19th Jan (tbc). Contact: C.Bortolin



AOB

• P2 shuttle to be prolonged till Fri 16th Dec

4/11/11

2011-12 winter shutdown preparatory meeting

Documents

Transcript of 2011-12 winter shutdown preparatory meeting