LS1 planning meeting - A.Tauro LS1 reference slides LS1 plans Detector’s plans Services and central systems availability 8/2/13 LS1 planning meeting - A.Tauro

LS1 plans

LS1 planning meeting - A.Tauro ALICE plans for LS1 Baseline sequence: Complete TRD detector (+5 Supermodules) Install DCal calorimeter (8 Supermodules). Including support structure and support beams Install 4 PHOS Supermodules  Numerous detector consolidation efforts Several things on top of this sequence: Consolidation of LV cables for TRD & TPC Extension SAA3 wall in RB26 side Consolidation of CO2 (racks) and N2 (central detectors) fire extinguishment systems New outlets for redundancy of Ethernet cables … Improvement and consolidation of infrastructure and services: EN-EL: UPS replacement and electrical infrastructure consolidation (UPS power increased from 160kVA to 800kVA)  EN-CV: P2 chilled water upgrade (+60% cooling power) EN-CV: L3 ventilation upgrade (+60% flow) 8/2/13 LS1 planning meeting - A.Tauro

ALICE detector after LS1 DCal calorimeter ALICE LS1 shutdown work PHOS ALICE detector 2012 run Shieldings removal +5 TRDs (18/18) Muon-TRK LV repair Main activities planned for LS1: Complete TRD detector (+5 Supermodules) Install DCal calorimeter (8 Supermodules). Including support structure and support beams Install 1 PHOS Supermodule  Numerous detector consolidation efforts EN-EL: UPS replacement and electrical infrastructure consolidation  EN-CV: P2 chilled water upgrade (+60% power) EN-CV: L3 ventilation upgrade (+60% flow) +5 TRDs DCal +1 PHOS ALICE detector after LS1

LS1 planning meeting - A.Tauro ALICE detector 2012 run 4/5 PHOS 18/18 TRD 18/18 TOF 7/7 HMPID 12/12 EMCAL 8/8 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 8/2/13 LS1 planning meeting - A.Tauro

LS1 planning meeting - A.Tauro ALICE detector after LS1 4/5 PHOS 18/18 TRD 18/18 TOF 7/7 HMPID 12/12 EMCAL 8/8 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 8/2/13 LS1 planning meeting - A.Tauro

LS1 planning meeting - A.Tauro ALICE detector after LS1 4/5 PHOS 18/18 TRD 18/18 TOF 7/7 HMPID 12/12 EMCAL 8/8 DCAL 1 2 3 4 5 6 7 9 8 11 12 13 14 15 17 16 10 2x 8/2/13 LS1 planning meeting - A.Tauro

ALICE now vs. LS1 15/1/13 ALICE LS1 plans - A.Tauro

Update on LS1 plans - A.Tauro Weeks Remove plug, mobile shielding, open doors 8-9 Prepare for PHOS extraction, remove RB24 beampipe and PMD 10 Remove PHOS cradle and modules, transfer TOF crates on SF 11-13 Modify L3 services and install YP for TRD17 14 Modify L3 services, remove TRD17 and rework LV distr. TRD 7-8-10-11, DCal insertion test SXL2 15-19 Modify L3 services, open low-beta and swap Q5L8 magnet, DCal tests in SXL2 20-23 Swap PHOS beams with DCal beams 24-27 DCal and PHOS services (1/2) 28-30 Install DCal Cradle 31-33 DCal and PHOS services (2/2) 34-35 Install 2 1/3 DCal modules 36 Install 3 DCal modules (C-side) 37-38 Open Days – 27-28-29/9 39-40 Reinstall TRD17 and rework LV distr. TRD15-16 41-43 Install top/bottom counterweights 44 Suspend Miniframe 45-46 Install TRD12-13-14 with yellow platform (bottom) 47-49 ‘Un-suspend’ Miniframe 50-51 Xmas pause 52-1 14/2/13 ALICE TB Update on LS1 plans - A.Tauro

Update on LS1 plans - A.Tauro Weeks Install 4 PHOS modules (incl.pre-commiss.) 2-5 Install 3 DCAL modules (A-side) 6-7 Concrete walls & TRD installation frame 8-9 Install TRD4-5 (top) & counterweights 10-11 Remove TRD infrastructure 12 Reinstall PMD, ZEM and comp. magnet 13 Reinstall and bakeout RB24 beampipe 14-15 ---- Close plug, mobile shielding 16-19 14/2/13 ALICE TB Update on LS1 plans - A.Tauro

Beampipe and forward detectors Week 8: neon injection (central and miniframe beampipe) Week 9: remove BLMs, survey Week 10: remove miniframe beampipe Will stay inside the cavern, above the L3 magnet Compensator magnet will be disconnected and removed later, before the suspension of the miniframe (November) ZEM and ADA will be brought into the SXL2 cleanroom PMD will be removed in week 10 Will stay in the PMD area in SXL2 V0-A & FMD1: decision as soon as PMD is out If V0 PMTs can be replaced in situ, there is no need to remove the detector 14/2/13 ALICE TB Update on LS1 plans - A.Tauro

P2 issues and LS1 preparations - A.Tauro LS1 – SAA3 upgrade 2011 2011-12 winter shutdown SAA3 wall located on the RB26 side: Wall height increased during 2011-12 winter shutdown. Wall width will be increased during LS1 in order to protect the ALICE detectors from background coming from the C-side New layout LS1 Civil engineering works needed for the extension of the support beams (red) 6/12/12 ALICE TB P2 issues and LS1 preparations - A.Tauro

Detector’s plans

LS1 – Detector’s main activities More details in Sept ‘12 TB Intervention When SPD Drill 5 filters (SR0-1-2-3-8) and upgrade cooling plant (new pumps) w15-20 (drilling) SDD Replace ISEG HV boards SSD Modify CAEN LVPS w12 (removal) TRD Install 5SM. Repair HV chambers SM17 and rework LV distribution for 7 SMs See next slide TOF Replace all CAEN DC-DC power converters with new version. Replacement of faulty DRMs, TRMs and LTMs. 10 SMs have to be displaced (~1m) September TPC FE and HV consolidation w10 and w12 to 14 PHO Remove entirely detector and its support cradle, install 1 additional SM. FE and readout consolidation Whole 2013 PMD Remove detector w10 EMC Change RCU-based readout to SRU-based readout March-April V0-A Not yet decided whether to remove the detector Decision after w10 FMD Fix leak inside FMD-A if V0-A is removed. Re-route cooling line inside miniframe and in C-side MTK Solve occupancy problem: repair LV bus-bars (90 chambers to be modified) ZDC Repair vertical movement system (take out both ZDCs) 14/2/13 ALICE TB Update on LS1 plans - A.Tauro

ITS SPD: SDD: SSD: Drill 5 filters (SR0-1-2-3-8) Minor interventions on the FEE cards Cooling: reuse old inlet pipes, recalibrate T-P sensors, remove sub-cooling Items under discussion: replace pump in cooling plant SDD: Replace ISEG boards (HV drift problem). Improve cooling in CR4 racks (to be studied) Install SuperCarlosRX cards  need DAQ for testing Cooling: replace plastic pipes of plant manifold (tbc), replace 10 P and T sensors and 5 P regulators SSD: CAEN LVPS modification (decrease CM)  Ship 120 PSs (Easy) to CAEN, in batches of 20-30/month, as from beginning of LS1. Test everything (including cooling plant) as soon as all cards are back (September?) Cooling: remove heaters and put plant under UPS (6kW), check safety valves and remove teflon tape. Calibration P sensors. Try to keep the plant running as much as possible. 6/9/12 ALICE LS1 plans - A.Tauro

TPC FEE consolidation. HV consolidation: Replace FECs. The A-side work on A-11 and A-12 requires to remove the SSD and SPD boxes (as we already did in the past). Install and commission redundant ethernet system HV consolidation: Maintenance Read Out Chambers Possibly inspection of containment volumes in field cage Interventions on RR and FEE cooling plants Gas. New CO2 analyser and gas chromatograph, drift velocity monitor consolidation 6/9/12 ALICE LS1 plans - A.Tauro

TRD SM production: New tank water cooling plant All electronics will be produced by end 2012 Plan to produce 5 SM in LS1 Preferred installation scenario: 3 bottom modules in 2013 and 2 top later. This would allow to install the last 2 (SM4 and SM5) in a winter technical stop in case they are not in time for LS1 New tank water cooling plant Gas: cryogenic recovery/cleaning at start of LS1  store Xe Operate the detector for most of LS1 with Ar-CO2 (70-30) Refill with Xe at some point in 2014 Find better CO2 analyzer, new gas chromatograph (TRD-TPC) 6/9/12 ALICE LS1 plans - A.Tauro

Update on LS1 plans - A.Tauro TRD HV & LV rework TRD HV & LV rework: Take out TRD17 for HV repair in Muenster Rework of LV distribution for 7 sectors (17-10-11-7-8-15-16) Schedule: wk 14 (i.e. beginning April): P2 crew prepares yellow-platform for TRD17 extraction. wk 15, starting from Monday 8th April: removal of TRD17. wks 16-19: rework LV for sectors 7-8-10 and 11. wks 41-43: reinstall TRD17 and rework LV for sectors 15-16. Definitely a huge enterprise ! Transport, P2 technicians, survey people and TRD crew Installation sequence (yellow-platform, blocks,…) looked at CAD No conflicts with miniframe services so far… TRD17 reinstalled before bottom modules installation (e.g. November) In parallel to L3 services modification for DCal 14/2/13 ALICE TB Update on LS1 plans - A.Tauro

LS1 planning meeting - A.Tauro TOF Transfer TOF crates to space frame: still technical discussions – decision hopefully next week. Load transfer should be done already in March (e.g. before TRD work). Cooling: equalization of the flow across the different SMs Full replacement of all CAEN DC-DC converters (A1396A): Replacement of faulty DRMs, TRMs and LTMs. Need to displace SR0-1-4-5-6-7-8-9-14-15 (tbc) by ~1m Profit to replace DC-DC converters September 2013 (2 weeks) TBC Improving of the ground connections. Intervention (eventually) on the cooling system, at the crate level, for two very hot crates in sector 08. 8/2/13 LS1 planning meeting - A.Tauro

PHOS During LS1 the detector will undergo several repairs (b.167): Fix problematic RCUs and TRUs Test and replace faulty FEE (implies access to warm region) APD/preamp are inside the cold area, will not be inspected, This would require extracting strip units from the crystal matrix and then mounting them back A new PHOS module (M1) will be assembled and installed in 2014 (2’000 crystals) Crystal cooling plant replaced with more powerful one. 6/9/12 ALICE LS1 plans - A.Tauro

EMCal Install new readout system – will take one month (March 2013) 6/9/12 ALICE LS1 plans - A.Tauro

PMD Currently in Super-safe. Re-start operation around end of the year LS1 work: Detector disconnected and brought on the surface ? Displace ELMD and LVDBs in order to improve air flow Crocus cables to be properly routed and supported (cut at same length) Improve crocus crate movement system ZDC Problems with the vertical displacement system of the ZP calorimeter platform, observed in the last two Pb-Pb runs. Mechanical improvement of the platform 1-2 months intervention around March 2013: take out the 2 platforms, bring them to the surface (location to be defined), modify and re-install them. 6/9/12 ALICE LS1 plans - A.Tauro

V0A & FMD V0: we still have to decide whether we should extract V0-A. To be decided whether to take out FMD1 (leaks in cooling system). 6/9/12 ALICE LS1 plans - A.Tauro

Muons Muon TRK: Muon TRG: Occupancy problem: repair slats (busbar connections): 90 slats to be repaired Will take ~10 months in 2013 (DAQ, DCS and gas needed) Replace one quadrant ST2 Muon TRG: Ordinary FEE and gas tightness maintenance Replacement of a few RPCs, if needed Full campaign of survey and photogrammetry Gas system modification to re-circulate freon (under discussion) 6/9/12 ALICE LS1 plans - A.Tauro

Services and central systems availability

Central systems interventions and their availability in 2013-14 DAQ will be off for several months as from week 22: Remove PCs and disks, disconnect fibers and replace racks (~2m) Replace central router and install new LDCs Logbook won’t be shut-down HLT. Computer farm replacement in early 2014. Old farm will be working at all times (except during power interruptions) DCS. Keep a minimum of services operational at all times (e.g. monitoring,…). Dismount old cluster (100 PCs) and re-arrange new cluster over more racks 6/9/12 ALICE LS1 plans - A.Tauro

LS1 planning meeting - A.Tauro DAQ planning (2013) Wk 22 – Switch-off DAQ Wk 22-25: removal PCs, rails and fibers disconnection Wk 26-27: disconnect and remove old racks. Reinstall new racks Test of integration of 1 new rack in Z09 or Z10 as soon as new rack available at P2 Middle march 45 racks + doors delivered to CERN middle March. Where to store them? Old racks to be disposed Old doors to be stored somewhere at P2 8/2/13 LS1 planning meeting - A.Tauro

Primary cooling & UPS interventions Maintenance of the P2 cooling towers: Week 22-30 (2013) During this time there is no cooling whole P2 The UPS work will start at the beginning of LS1. In order to be aligned with the CV intervention, power to the CRs will only be cut in week 22: E.g. no power CRs weeks 22-30 (~2 months) 8/2/13 LS1 planning meeting - A.Tauro

LS1 planning meeting - A.Tauro LS1: CV main activities Maintenance cooling towers, pumps – including control (UNICOS) Maintenance detector cooling plants and air cooling units Replacement pumps and heat-exchangers UW New L3 jacket valve Upgrade L3 ventilation  from 6’000m3/h to 10’000m3/h Upgrade chilled water network (replace 3 existing chillers, add 2 new chillers…)  increase installed cooling power from 5.4MW to 9MW Renovation demineralized-water station (CERN Meyrin)  no demineralized water from 15/5/13 to 30/7/13 Install heat exchanger ITS air ventilation unit (weeks 22-30, 2013), and fix leaks (and isolate) pipe SX  UX  Several water interruptions!!! See next slides 8/2/13 LS1 planning meeting - A.Tauro

New dates CV activities (2013) What When Cavern CRs Maintenance UW circuits wks 22-26 - June No mixed & chilled water. No raw water cooling No interruptions New controls UW ? Maintenance cooling towers (SF) + chilled water upgrade part I (replacement impeller SF pumps, SU chillers and SU Heat exchangers) wks 27-35 – July - Aug No mixed & chilled water. No raw water cooling. No air cooling. No mixed water. Possibility to use tap water for few racks New controls in SF Maintenance SU + controls SU wks 36-40 - Sept No mixed & chilled water Upgrade L3 ventilation October 2013 L3 jacket control from week 20 (1 month) 8/2/13 LS1 planning meeting - A.Tauro

CV activities (2014-15) What When Cavern CRs Replacement UW PHE and pumps, new valve L3 jacket wks 7-16 (2014) No mixed & chilled water. No raw water cooling. (around 1 month) No interruptions Chilled-water upgrade part II (one new chiller + electrical connections) January 2014 Short interruptions mixed & chilled water No mixed water. Possibility to use tap water for few racks Maintenance cooling towers (SF) 3 wks, during 2014 (tbc) No mixed & chilled water. No raw water cooling. No air cooling. All CV/DC circuits stopped Chilled-water upgrade part III (one new chiller) January 2015 Commissioning new chilled water system Asap after January 2015, when 2 wks available No mixed & chilled water 8/2/13 LS1 planning meeting - A.Tauro

LS1: detector cooling activities Standard maintenance Intervention on specific systems: Replacement tank TPC and TRD cooling plants New loop for DCal (in TOF/PHOS/CPV/EMC cooling plant) Put ITS cooling plant on UPS (remove heaters and swap valves) Common infrastructure: Add filters upstream each cooling plant (mixed and chilled water) Implement fail-safe vacuum pumps, i.e. the vacuum pump keeps working when the PLC dies All these interventions are scheduled from week 24 (10 June 2013) onwards, and will last approximately for 1.5 months Due to the primary cooling maintenance (SF+UW+SU)  No chilled water weeks 22-40 14/2/13 ALICE TB Update on LS1 plans - A.Tauro

LS1 planning meeting - A.Tauro LS1 – EN-CV-DC planning Q5L8 cooling plant running normally cooling plant running without cooling cooling plant stopped All detector cooling interventions in the shadow of the cooling towers maintenance 8/2/13 LS1 planning meeting - A.Tauro Sebastien Roussee

LS1: gas systems activities Standard maintenance and software update (PVSS) Intervention on specific systems: TRD and TOF: new spare pumps in CR5 MTG: gas recirculation (MTG C2H2F4 yearly budget is 60kCHF) Common infrastructure: New N2 lines (including separate line for L3) and pneumatic valves New scales for Freon and Isobuthane Renovation of N2 and Ar dewars Check calibration of flow meters Detailed planning exists – has to be discussed with gas experts 14/2/13 ALICE TB Update on LS1 plans - A.Tauro

Status of gas systems in 2013 Detector Gas system When Remarks TPC Reduce Ne/CO2 flow by a factor 2 (i.e. 22.5l/h instead of 45l/h) February TRD Xenon recuperation. February-March Detector under Ar/CO2 during the rest of the year. TOF Stop flow. Date tbd Restart occasionally. Backup in operation. HMP Stop and recuperate C6F14 (radiators). 16 February (stop). Recuperation in March. Keep Ar circulation (reference gas) Switch from CH4 to Ar. 18 February MCH Gas needed most of the time to check detector repair (Ar‐CO2 not mandatory for a long period; but needed at some point for tests). MTG Stop gas system. 21 February PHOS Stop N2 flow. Right before removal from the pit (week 11) PMD Right before removal from the pit (week 10) CPV Ar/CO2 needed. Beginning 2014 14/2/13 ALICE TB Update on LS1 plans - A.Tauro

LS1 planning meeting - A.Tauro Gas planning (draft) 8/2/13 LS1 planning meeting - A.Tauro

LS1 – gas systems upgrade 1/2 Standard maintenance gas systems Sept.’13 to Jan.’14 Each system stopped 1 week Software update (migration to PVSS) Date still not frozen, around beginning 2014 TRD: Add 3rd pump (spare) in CR5. 1 month intervention (1w stoppage due to relocation of buffer)  August-Sept.’13 TOF: Add 2nd pump (spare) in CR5.  Nov.’13 MTG: Modification of the system in order to recirculate Freon. Big project: add one pump, purifier, regulation valves and one new line in UX25 (partially paid by M&O) (60kCHF project) Add humidifier Check stability of the regulation of the gas flow 8/2/13 LS1 planning meeting - A.Tauro

LS1 – gas systems upgrade 2/2 Replace N2 pipes CR5-UX25 Arturo to ask RENCO Several leaks in 2011-12  might have stopped gas systems Will imply stopping all the systems Replace pneumatic valves (Festo instead of Parker) TRD,MTR,TOF,MCH Dec.’13 New scales for Freon and Isobuthane N2 and Ar dewar renovation 2 months in total – possibility to supply gas with bottles In parallel to P2 cooling tower maintenance (wks 22-30), tbc. Redo PHOS/CPV N2 lines inside L3 Redo TOF gas flexible pipes (L3, O-side) Improve EMCal access New feed through for N2 pipe SG2 wall (pipe not insulated presently) Put plastic protection on the rack. Safety valve on gas side. Check the calibration of mixer mass flow meters 8/2/13 LS1 planning meeting - A.Tauro

LS1 planning meeting - A.Tauro LS1: EL main activities AUG = Test Arret Urgence wk 32 (2013): Aug 9th wk 10 (2014): towards the end of the week Maintenance switchboards (18kV, 3.3kV and basse-tension) wk10 (2014): 2-3 days no access UX Test auto-transfert: 9th and 10th Mar 2013 Test on 400kV network (13/5/13 to 28/7/13)  CERN total power limited to 60MVA UPS project  increase UPS power from 160kVA to 800kVA  Punctual power interruptions (except UPS project) 8/2/13 LS1 planning meeting - A.Tauro

LS1: PH-DT (magnets) activities PH-DT: replace 100 PT100 (hot-points) + N2 line L3 8/2/13 LS1 planning meeting - A.Tauro