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

2. 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

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
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

4. General parameters Q1: can we run from the CMS CSC mixer? Limit of
GEM’s (T2)
CSC (T1)
Gas:
Ar/CO2
70/30
Ar/CO (CF4 optional)
50/ (40/50/10)
Total volume:
~40 litres
400 litres
Total flow:
l/h
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

5. 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

6. 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

7. 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

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

9. 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

10. 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

11. 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

12. 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

13. 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

14. 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