ls1 reference slides ls1 plans detector’s plans services and central systems availability...

LS1 reference slides

• LS1 plans• Detector’s plans• Services and central systems availability

8/2/13 LS1 planning meeting - A.Tauro 1

LS1 plans

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)


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)

ALICE LS1shutdown

work

http://cdsweb.cern.ch/record/1046793

4/5 PHOS 18/18 TRD 18/18 TOF7/7 HMPID12/12 EMCAL8/8 DCAL

ALICE detector 2012 run

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4/5 PHOS 18/18 TRD 18/18 TOF7/7 HMPID12/12 EMCAL8/8 DCAL

ALICE detector after LS1

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ALICE detector after LS14/5 PHOS 18/18 TRD 18/18 TOF7/7 HMPID12/12 EMCAL8/8 DCAL

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ALICE now vs. LS1

15/1/13 ALICE LS1 plans - A.Tauro 8

25/2/13 TRD options LS1 - A.Tauro 9

LS1 plan 2013 WeeksRemove 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

Contingency 31-35 (August)

Install DCal Cradle 36-38

DCal and PHOS services (2/2) 39-40

Open Days – 27-28-29/9 39-40

Install 2 1/3 DCal modules 41

Install 3 DCal modules (C-side) 42-43

Rework LV distr. TRD15-16 Two weeks between 44 and 51

Xmas pause 52-1

25/2/13 TRD options LS1 - A.Tauro 10

LS1 plan 2014 WeeksInstall 4 PHOS modules (incl.pre-commiss.) 2-5

Install 3 DCAL modules (A-side) 6-7

Install top/bottom counterweights 8

Suspend Miniframe 9-11

Install TRD12-13-14 with yellow platform (bottom) 12-14

‘Un-suspend’ Miniframe 15-16

Reinstall TRD17 17

Concrete walls & TRD installation frame 18-19

Install TRD4-5 (top) & counterweights 20-21

Remove TRD infrastructure 22

Reinstall PMD, ZEM and comp. magnet 23

Reinstall and bakeout RB24 beampipe 24-25

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Close plug, mobile shielding 26-29

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 11

2011

New layout LS1

LS1 – SAA3 upgrade

6/12/12 ALICE TB P2 issues and LS1 preparations - A.Tauro

12

2011-12 winter shutdownSAA3 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

Civil engineering works needed for the extension

of the support beams (red)

Detector’s plans


Detector 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) Whole 2013

ZDC Repair vertical movement system (take out both ZDCs) March-April

LS1 – Detector’s main activitiesMore details in Sept ‘12 TB

ITS

• SPD:– 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.


TPC

• FEE 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


TRD

• SM production:– 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)


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

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.


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.


EMCal

• Install new readout system – will take one month (March 2013)


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.


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

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).


Muons

• Muon TRK:– 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)


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


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


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)


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

What When Cavern CRs

Maintenance UW circuits wks 22-26 - JuneNo mixed & chilled water.

No raw water coolingNo 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 No mixed & chilled water

Upgrade L3 ventilation October 2013 No interruptions No interruptions


New dates CV activities (2013)

L3 jacket control from week 20 (1 month)

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 2014Short 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 2015Short interruptions mixed

& chilled water

Commissioning new chilled water system

Asap after January 2015, when 2 wks available

No mixed & chilled water


CV activities (2014-15)

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

LS1 – EN-CV-DC planning


Sebastien Roussee

cooling plant running without cooling

cooling plant stopped

cooling plant running normally

Q5L8

All detector cooling interventions in the shadow of the cooling towers maintenance

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

Detector Gas system When Remarks

TPCReduce Ne/CO2 flow by a factor 2 (i.e. 22.5l/h instead of 45l/h)

February

TRD Xenon recuperation. February-MarchDetector under Ar/CO2 during the rest of the year.

TOF Stop flow. Date tbdRestart occasionally. Backup in operation.

HMPStop and recuperate C6F14 (radiators). 16 February (stop).

Recuperation in March.Keep Ar circulation (reference gas)

Switch from CH4 to Ar. 18 February

MCHGas 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 Stop gas system.Right before removal from the pit (week 10)

CPV Ar/CO2 needed. Beginning 2014


Status of gas systems in 2013

Gas planning (draft)


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– Each system stopped 1 week

• 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


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– Arturo to ask RENCO

• Redo TOF gas flexible pipes (L3, O-side) – Improve EMCal access– Arturo to ask RENCO

• 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


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)

LS1: PH-DT (magnets) activities

• PH-DT: replace 100 PT100 (hot-points) + N2 line L3


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