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The Construction of the LHC
Detector Gas Systems ?Ferdi Hahn
PH-TA1-GS
Detector Steering Meeting
4th of June 2004
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Content
Context and TA1-GS sectionDescription of Gas ProjectProblem AreasManpower Schedule and MilestonesConclusions as of Today
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Context
Part of Central support group, in charge to build the gas systems for the 4 LHC experiments.Size of the Project (baseline):
Method:– Split up the systems in functional and scalable
modules that can be standardized.– Be genuine partner for the experiments, helping
them to solve their problems.
4 MSF Components + Materials
60 man-years Staff, fellows and PJAS
34 man-years External manpowerType B:
Type A:
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TA1-GS Section:
3 Physicists (2 Staff and 1 PJAS):– Work out the solutions with the experiments– Management of the project– Definition of gas system controls (Collaboration
with IT/CO)
5-6 Technicians/Engineers – Planning + organization of the construction,
ordering of material etc.
– Handle Industrial contracts
5-10 persons FSU + institute manpower– They assemble and install the gas modules.
Type A
Type B
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Gas Project
Gas Systems
TA1 Deliverables
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Our Activities
Baseline:All detector gas systems of the four LHC experiments.
Extras:Auxiliary systems for the LHC detectors, e.g. Flushing systems, etc.Temporary Installations for the LHC detectors for commissioning of chambers, etc. Test systems: GIF,….
Support Work: Test beam support, MFC calibrartion, etcFT experiments
Limited to 1 FTE/y
Case by case ….
Prime activity!
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Baseline Systems(Detector Volumes [m3])
ATLAS CMS ALICE LHCbMDT (800m3) DT (250 m3) TPC (100 m3) CPC (9 m3)
RPC (18 m3) RPC (14 m3) TRD (28 m3) OT (4 m3)
CSC ( 2m3) CSC (66 m3) TOF (16 m3) RICH 1 (4 m3)
TGC (16 m3) HMPIDCPVPMDCPCRPC
( all < 2 m3)
RICH 2 (100 m3)
TRT (3 m3)
3 485
=> All together 20 systemsIn Black: Re-circulation systems
In Blue: Single pass systems
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Baseline Construction Program
Modules ATLAS CMS ALICE LHCbNo. of
Modules
Mixer 5 3 8 2 18
Purifier 4 3 4 4 15
Circulation Rack 3 3 3 4 13
Pump 5 3 3 4 15
UX Distribution 35 24 12 10 81
Analysis 4 2 2 1 9
US Distribution 5 8 0 4 17
Membranes 1 1 2 4
Control Racks 5 3 8 4 20
Total 67 49 41 35 192
35% 26% 21% 18%
Number of Modules (~ Number of Racks)
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System with Special Modules or Special Attention
ATLAS– MDT (extra work partly covered by ATLAS)– TRT (extra work covered by ATLAS)– TGC n-pentane supply and recovery
CMS:– Non
ALICE:– TRD (some extra development)
LHCb:– 2 x RICH’s (will need extra development) – OT (??)
Extra PhysicistNeeded
These special units are included in the baseline, but they consume more manpower.
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Today’s Status (on baseline production)
ALICE TPC system is completed and currently under test in Bldg. 167. – First tests of PLC + PVSS software are
done successfully
CMS distribution modules are completed (22 racks).Mixer production is ongoing (40-50%)
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Extra’s and Auxiliary Systems
ATLAS– TRT cooling system– Inner Detector Purge Systems
TOTEM – 2 systems
We have many requests for temporary installations or test systems: in particular from ATLAS and CMS, but we have no resources to satisfy this needs (since 2002).
Work Package proposal from ATLAS
No Work Package yet
No Packages defined.
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Problem Areas
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Problem Areas
Ageing risk: – Induces bottlenecks for the Component
validation..– Multiplies iterations for all decisions of the project.
Schedules: 1. Delays bco holdups in components validation.2. High overlap and early delivery dates.3. Progress monitoring is not very transparent.4. Work order: so far first come first served.
Additional Work:– ATLAS inner Tracker– TOTEM– ….
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Ageing Risk
Three systems which are believed to be very sensitive. (ALTLAS TRT, MDT, and LHCb OT)
We have set up a Quality plan that is agreed with the experiments, which should cover these risks.
Nonetheless, numerous iterations for many decisions. (BTW: How long it takes depends very much on the people.)All resource evaluations underestimate this problem!
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Schedule
Current Bottlenecks:– Decision making– Component ordering is slow– Component dismantling and cleaning– Technical problems with some components after cleaning
Delivery delays long due to special cleaning, overheads due to QC procedures, dismantling extra cleaning , etc. No or little stock in CERN store….Large overlaps in schedules between experiments.– 20 projects all priority “1”,… too many things worked on in
parallel.– Delivery dates between 2005 and 2006. – So far: first come first served, this causes some frustration now.
We need some priorities from the experiments.
Bottlenecks have to be solved to
increase construction
capacity
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New Work Packages
ATLAS Tracker purge and cooling systems.
Proposed by ATLAS approx. 1-2 m-y’s (of type B plus x type A)
TOTEM ( no work package yet)
Guesstimate:1 m-y of type “B”
Temporary installations ( should be done by experiments)
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Manpower
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Manpower (2 types)
Type A: Engineering and Management labor:These are project managers and engineers: Supervision, logistic
and management of construction; conducting tests; problem solving etc.
Scales with: complexity of project, novelty of the work, technical difficulties, etc.
These are: Staff, fellows, PJAS, etc.
Type B: Construction and installation labor:These are people that assemble the racks:Scales with: Number of racks to make.These are: FSU, Institute labor (ATLAS) (not available as
staff)
To be paid
by Experiments
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Manpower Type “A”
Initial Estimate for construction Period (2003 to 2007): 60 FTE’s over 5 years
Activities with general interest are covered by TA1: guess 75%, so 45 FTE’s
Specialized work for individual sub-detectors: should be covered by experiments: guess 25%, so 15 FTE’s.
For Baseline Systems Only.
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Type “A” Manpower versus Time
2003
2004
2005
2006
2007
Total
Staff Physicists
2 2 2 2 2 10
Staff Technicians
6 6 5 4 4 25
FellowsExperiments
0 0 0 0 0 0
PJAS’sExperiments
1 1 1 1 0 4
Total: 9 9 8 7 6 39
3 3 3 13
7 6 6 31
12.5
12 9.5 52
Current situation and updatesTA1 and Experiments
In Red: includes 1 extra physicists and 1 extra technician plus the current vacancy for TA1-GS (117) (as discussed with V.V.)
1.5 2.0 0.5 4
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Type A Manpower versus Project
Experiment
Percent
FTE’s(TA 1)
FTE’s(Experime
nts)
ATLAS 35% 16 4
CMS 25% 11 0
ALICE 20% 9 2
LHCb 20% 8 2
Total 100% 44 8
Guesstimate
52+9
Extra
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Type “B” Manpower versus Project
Manpower
Estimate [man-years]
Work complete
d[man-years]
Remaining
Work [man-years]
ATLAS 12.5 (Muon+TRT gas)
0.3 12.2
CMS 8 3.5 4.5
ALICE 7.5 2.1 5.4
LHCb 7.3 0.1 7.2
Total 35.3 6.0 29.3We need ~3 years.
For Baseline Systems Only.
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Manpower Type “B” versus Time
2003
2004200
5200
6200
7
Total(2003-2007)
FSU 3 5 5 5 3.6 23
Industry (external)
0 0.3 0.6 0.3 0 1
ATLAS Protvino
0.4 2.5 4 4 1.6 12.5
Total 3.4 8.8 9.6 9.3 6.6 35.5
Total of Remaining
Total(remaining)
16.1
1
10.8
29.3
Due to delays, efficiency is dropping:Example ATLAS : Remaining work is 12.2 m-y’s, remaining manpower planned is 10.8 m-y’s.
For Baseline Systems Only.
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Schedule
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Experiment’s Schedules
Area / Sub-Detector
SG BuildingUSA15UX - TRTUX - Muons
SG BuildingUSC55UX RacksMuon SystemOuter TrackerRICH 1RICH 2TPCTRDTOFPMDHMPIDMUON TrigMUON Track InstallationCPV Milestone
20062003 200720052004
CMS
ATLAS
LHCb
ALICE
(Milestones)
Most items must be installed until early 2006
80 % 100 %
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Construction Schedule
Distribution
CMS
ATLAS
LHCb
ALICE
Mixer (series)
Purifier (series)
SG-Circulation, Exhaust (series)
Pump (series)
US Distribution (series)
Membrane Sep. (series)
Special Units:
TRT Modules (ATLAS)
TRD Modules (ALICE) Core Installation periods
RICH Modules (LHCb) Shift / extension
TPC Modules (ALICE) Milestone
Special System
2006 20072003 2004 2005
Installation not included (10.3 m-y’s)
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Comments to Schedule
The construction of all the baseline systems will go on until the end of 2006. Installation is likely to continue in 2007.It is absolutely important that similar modules are constructed in series. (The experiments have to adopt to our construction schedule.)
Side activities have to be reduced.Focus efforts on essentials for 2007.
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Conclusions
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Conclusion as of Today
Present Commitments: – Baseline – If Extra’s to be added WP’s need to be completed
urgentlyManpower Situation:– Type A: increase from 39 to 52 FTE’s (initial estimate
was 60). Extra: PH +9 FTE’s; Experiments +4 FTE’s
– Type B: 35 m-y’s efficiency must be monitored (1/6 months).
Schedule:– Extends to 2007 (What could be delivered after 2006 ?)– Bottlenecks must be improved
Work order: – list of critical deliverables for 2007