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Totem Gas Systems ( T1 , T2 )

Totem Gas Systems ( T1 , T2 ). F. Hahn and S. Haider PH / DT1. Outline. Work package General layout and functionality Mixer unit Gas Distribution unit Schedule Cost estimate Conclusions. Gas system work package. 2 gas systems: CSC (T1) and GEM (T2)

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Totem Gas Systems ( T1 , T2 )

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  1. Totem Gas Systems( T1 , T2 ) F. Hahn and S. Haider PH / DT1

  2. Outline • Work package • General layout and functionality • Mixer unit • Gas Distribution unit • Schedule • Cost estimate • Conclusions S.Haider, F.Hahn PH/DT1

  3. 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 • Pipe work done by TOTEM and/or Criotec • 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 S.Haider, F.Hahn PH/DT1

  4. Can we run from the CMS CSC mixer? General parameters S.Haider, F.Hahn PH/DT1

  5. Schematic overview of the gas systems Gas Rack situated on HF platform S.Haider, F.Hahn PH/DT1

  6. Gas mixing unit (not for ‘07 startup) S.Haider, F.Hahn PH/DT1

  7. Comments Mixer Module • Both Mixer staged until second year of LHC running. • In the first year: • T1: Gas could be taken from CMS mixer ? (I have contacted OleG P. no reaction for the moment…) • Otherwise one could use pre-mixed bottles like for T2. S.Haider, F.Hahn PH/DT1

  8. UX distribution unit for T1 and T2 Altogether there will be two racks of this type, one for each endcap. S.Haider, F.Hahn PH/DT1

  9. ~3 m T2 telescope 5 planes with 2 x 3 chambers Gas System: 3 chambers (on the same plane) are connected to one common gas supply S.Haider, F.Hahn PH/DT1

  10. Pipe connections for T1 and T2 UX distribution rack (one endcap): CO2 line for backup T2 To / from T2 T1 To / from T1 US UX US-UX supply / return Note: Return lines 4x Ø =12 mm And Analysis lines 4xØ = 6mm Are unused for the moment. Gas exhaust into the cavern! Analysis lines S.Haider, F.Hahn PH/DT1

  11. Gas pipes from Racks to Chambers: T1 : supply 10 * Ø = 4/6 mm Return 10 * Ø =10/12 mm T2 : supply 10 * Ø = 4/6 mm Return 10 * Ø =10/12 mm Supply lines from USC: through central cable chain underneath CMS Top view: CMS Interaction Point T2 T1 T2 T1 Note: Due to infrastructure all pipe runs have flexible parts requiring cable chains, etc. flexibles UX distribution Rack for T1 and T2 S.Haider, F.Hahn PH/DT1

  12. Schedule • Production: • All material for 2 distribution racks are at CERN • Assembly will start beginning of February,- finish probably March, delivery > April possible • 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 (t.b.c.) S.Haider, F.Hahn PH/DT1

  13. Mixer will increase by ~2’000 SFr Preliminary cost estimate S.Haider, F.Hahn PH/DT1

  14. Conclusions • The Totem UX distribution racks are well established in our production line. Mixers will come later. • Construction of UX racks has started, they will be ready in two months. S.Haider, F.Hahn PH/DT1

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