The Construction of the LHC

Detector Gas Systems ?Ferdi Hahn

PH-TA1-GS

Detector Steering Meeting

4th of June 2004

Content

Context and TA1-GS sectionDescription of Gas ProjectProblem AreasManpower Schedule and MilestonesConclusions as of Today

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:

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

Gas Project

Gas Systems

TA1 Deliverables

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!

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

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)

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.

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%)

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.

Problem Areas

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– ….

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!

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

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)

Manpower

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

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.

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

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

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.

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.

Schedule

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 %

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)

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.

Conclusions

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