‘Rack Status‘

Jean-Pierre Vanuxem, PH-AIS JPV, TB of Nov.15

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Rack Status (1)

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Layout and Allocation:

– known to ~ 100% ! – 250 racks to be used + 52 spare locations – documented in: EDMS ALICE-SER-SPC-021, v.3

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Power:

– known to ~ 100% !

– type: 1-phase / 3-phase and standard power / UPS – documented in: EDMS ALICE-SER-SPC-022, v.3

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Contents:

– known to ~ 80% at sub-rack level – documented under ‘Rack contents’ at: http://aliceinfo.cern.ch/Collaboration/Technical_Coordination/ElectronicsRacks.html

– Help from all sub-detectors is still required to complete this task !

JPV, TB of Nov.15

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Rack Status (2)

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Purchase of Infrastructure Components:

– Standard: turbine units + air deflectors, heat exchangers, ventilation units, water collectors, brackets, adaptors, fittings, etc.

– Non-standard: cooling doors for PC racks (CR1-CR3), internal power distribution boxes (UX25) •

Installation:

– Cooling: TS-CV – ‘Hazemeyer’ switchboards + ZTBF32 modules: TS-EL – Rack enclosures: ALICE Integration Team (AIT) – Primary power to ‘Hazemeyer’ + control: TS-EL – Secondary power to racks + control: TS-EL + DCS team – Rack infrastructure components: AIT JPV, TB of Nov.15

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Guidelines to maintain costs low

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Recuperate existing LEP equipment

– CV (L3): water cooling for racks + air conditioning systems in CR1-CR4 – Mechanics (L3, ALEPH): Rack enclosures + Other Rack components (back doors, brackets, etc.) – Electricity (L3): » UPS units (80 kVA + 60 kVA) » Hazemeyer Switchboards with ZTBF32 modules

Make use of COTS (if possible from CERN stores)

– CV: turbines, ventilation units – Mechanics: » rack enclosures  new ‘LHC racks’ 52U/41U, 1000mm deep » VME crates (6U/9U) – Electricity: VME-PS, LVPS, HVPS, Cables, Connectors,

Group Orders with other LHC experiments

– cooling doors for PC racks (together with LHCb)

Organize maintenance locally at CERN

– define the role of PH-ESS Electronics Pool JPV, TB of Nov.15

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Installation details (1)

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Civil Engineering (TS)

– All done, except false floors in C and D areas which are being built •

General Cooling and Ventilation (TS-CV)

– All done, except in C and D •

General Power (TS-EL)

– Mostly done in CR1-CR5 + A + B •

Rack Placement (AIT)

– All racks in CR1-CR5 + A + B are installed •

Basic Rack Equipment (AIT)

– All 250 racks will need to be equipped with infrastructure components during 1 st semester 2006 JPV, TB of Nov.15

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JPV, TB of Nov.15

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Installation details (2)

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Individual Rack Powering (TS-EL + AIT)

– A few racks (5 ?) are already powered for tests in CR1+ CR3 – PX24 (CR1-CR5) : all racks will be powered in April 2006 – UX25 (A + B + C + D): May 2006 •

Power Control (TS-EL)

– Done by ‘ENS’ at the level of Hazemeyer ZTBF32 modules – PLC of type ‘Premium’ (from Schneider) – DCS as ‘client’ to ENS ‘server’ – Entire system ready in July 2006 JPV, TB of Nov.15

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And now follows a pictorial trip, around and inside the ALICE racks:

‘ALICE in Rackland’ . . .

JPV, TB of Nov.15

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