Totem Gas Systems ( T1 , T2 ) S. Haider PH / DT1

Outline Work package General layout and functionality Schedule Mixer unit Gas Distribution unit Schedule Cost estimate Questions summary Conclusions 31/1/2006 TOTEM Engeneering Design Review S.Haider PH/DT1

Gas system work package 2 gas systems: CSC (T1) and GEM (T2) 2 mixer units (not for 07 startup) 4 UX distribution units Each endcap 1 rack with 2 distribution units for T1 and T2 2 control racks: 1 in SG and 1 in US for T1 and T2 In SG, each system will have it’s own PLC control User interface in PVSS 31/1/2006 TOTEM Engeneering Design Review S.Haider PH/DT1

General parameters Q1: can we run from the CMS CSC mixer? Limit of GEM’s (T2) CSC (T1) Gas: Ar/CO2 70/30 Ar/CO2 (CF4 optional) 50/50 (40/50/10) Total volume: ~40 litres 400 litres Total flow: 50-100 l/h 70-200 l/h Chamber pressure 1 mbar 1 to 3 mbar Max. overpressure < 10 mbar < 20 mbar No. of Channels 10 channels/endcap 10 channels per endcap No. of Chambers 20 30 No. of Distribution Racks 1 per endcap Limit of Accuracy! 31/1/2006 TOTEM Engeneering Design Review S.Haider PH/DT1

Schematic overview of the gas systems Q2: Are these pipes in the Contract of Criotec ? Q3: do these pipes arrive at the correct place ? 31/1/2006 TOTEM Engeneering Design Review S.Haider PH/DT1

Pipe connections for T1 and T2 UX distribution rack (one endcap): To / from T2 T1 To / from T1 US UX US-UX supply / return Q4: are there flexibles in the supply lines? Q5: Return to US not used for now ? Q6: CO2 backup line comes from where? Q7: Are analysis lines really unused? CO2 line for backup Analysis lines 31/1/2006 TOTEM Engeneering Design Review S.Haider PH/DT1

T2 T1 T2 T1 Top view: CMS Interaction Point flexibles Gas pipes from distribution rack to chambers Q8: planned for when ? Q9: who is doing it ? Q10: what are the distances for each line? Q11: has T1 UX rack to chambers pipes in Rilsan been confirmed by SC ? T2 CMS Interaction Point T1 T2 T1 flexibles UX distribution Rack for T1 and T2 On T2 platform, supplied through central cable chain underneath CMS 31/1/2006 TOTEM Engeneering Design Review S.Haider PH/DT1

Gas mixing unit T1 T2 Gas 1 Gas 2 Gas 3 (not for ‘07 startup) CO2 50 CO2 30 Gas 3 CF4 - (10) - Gas mixing unit (not for ‘07 startup) 31/1/2006 TOTEM Engeneering Design Review S.Haider PH/DT1

UX distribution unit for T1 and T2 Q7: Are analysis lines really unused? Q12: NO hardware Input protection !!!! Q6: CO2 backup line comes from where? 31/1/2006 TOTEM Engeneering Design Review S.Haider PH/DT1

Schedule Production: Installation Commissioning All material for 2 distribution racks are at CERN Assembly will start beginning of February,- finish probably end of the month Installation Cables are procured now (by CMS / Totem) and installed for +Side from May onward Gas rack installation will start around June In July, Criotec will install the gas pipes to the UX racks Commissioning Probably toward the end of 06 31/1/2006 TOTEM Engeneering Design Review S.Haider PH/DT1

Preliminary cost estimate   GEM (T2) CSC (T1) Gas Supply (special items only) - Mixer 17’000 19’000 Pump, purifier, analysis Distribution 22’000 Aux. Purge included in UX-Distribution Piping SG-USA not costed Piping USA-UXA Detector Piping Electrical Control 40,000 Total material SFr. 79’000 SFr. 81’000 Manpower (racks) 24,000 Total SFr. 103’000 SFr. 105’000 Mixer will increase by ~2’000 SFr 31/1/2006 TOTEM Engeneering Design Review S.Haider PH/DT1

Questions (1/2) Q1: for T1, can we take gas from the CMS CSC mixer? (in case the same gas mixture is used) Pipes from US to UX Q2: are these pipes in the contract of Criotec? Q3: do they end at the correct places? Q4: are there flexibles in the supply lines? Q5: Return to US not used for now ? Q6: CO2 backup line comes from where? Q7: Are analysis lines really unused? 31/1/2006 TOTEM Engeneering Design Review S.Haider PH/DT1

Questions (2/2) Gas pipes from distribution rack to chambers Q8: planned for when ? Q9: who is doing it ? Q10: what are the distances for each line? Q11: has T1 UX rack to chambers pipe in Rilsan been confirmed by SC ? Q12: there are no hardware input protection bubblers foreseen? 31/1/2006 TOTEM Engeneering Design Review S.Haider PH/DT1

Conclusions The Totem UX distribution racks are well established in our production line. Mixers will come later. Construction of UX racks will start beginning February 31/1/2006 TOTEM Engeneering Design Review S.Haider PH/DT1