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Pixel Update. October 3, 2005. Outline. Barrel status and repair strategy Revised ATLAS installation schedule Finishing pixel work at LBNL Disk/endcap schedule Service panels and related Work at CERN. Barrel Staves. Stave loading started about 1 year ago.

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pixel update

Pixel Update

October 3, 2005

outline
Outline
  • Barrel status and repair strategy
  • Revised ATLAS installation schedule
  • Finishing pixel work at LBNL
    • Disk/endcap schedule
    • Service panels and related
  • Work at CERN
barrel staves
Barrel Staves
  • Stave loading started about 1 year ago.
    • 44/112 (39%) staves have been loaded (one partially) till now;
  • First problem (April): MCC wire-bonds break. Reason seems contamination of MCC surface by SE4445 used to glue MCC to FlexHybrid (Maurice figured this out). All MCC encapsulated must be rebonded.. Bonn is the only site who developed the technique.
    • 28 (7 Wu, 8 CPPM, 13 Genova) staves in total have MCC encapsulation.
    • 3 done. Note this affects disks also, repairs in progress at LBL
  • Second problem (May): Omega delamination from TMT. Loading stopped for one month.
    • 2 staves have been found to be delaminated;
    • Peek collar designed and successfullyapplied to several bare and loaded staves.
    • Strength to delamination increaseof ~6x for pull/torque.
  • Third problem (August Crisis): Al pipe corrosion… production halted
slide5

Inspection

Clean: 32 staves

Salted: 28 staves

Nickel peals off: 18 staves

corrosion
Corrosion
  • Galvanic corrosion from nickel-aluminum interface, nickel necessary to braze on fittings
  • Thermal tests done using water-antifreeze mixture and insufficient drying in many cases
  • In addition to visual signs of corrosion, leaks develop.
  • About ½ of staves looked at and 15% leak, in some cases with a dozen or more holes caused by corrosion.
  • Develops over time => replace all stave pipes
  • Note that no corrosion has been seen in production disk sectors made at LBL – different process, no water
repair strategy
Repair Strategy
  • 43 loaded staves. Insert another pipe inside the existing pipe and inject “glue” with good thermal properties but there will be an increase in the module temperature. Glue on fittings. Pipes of appropriate diameters ordered, some preliminary tests but not proven yet.
  • Staves without modules. Dismantle staves. It turns out that the gluing was not great so using tooling + local heat can take apart stave, replace pipe and put back together. Demonstrated on one stave, tooling, procedures in progress.
  • Make new staves, particularly for the innermost layer. New materials ordered or about to be
  • In addition, change to fitting scheme developed at LBNL for everything – no nickel or dissimilar metals.
who is doing what
Who is Doing What
  • Insert pipe in loaded staves. Marseille and CERN but exact responsibilities TBD
    • Qualify process using dummy staves with heaters. What is increased temperature and pressure drop
    • Develop procedures
  • Dismantle and reassemble. Genoa. Likely to yield fixed staves first.
  • Build new staves
    • Material procurement: LBL and Germany
    • Machining of thermal management tiles: LBL and Wuppertal
    • Assembly: company(IVW) in Germany and Wuppertal
resuming module loading
Resuming Module Loading
  • The critical path is to produce and qualify new aluminum tubes. Marseille with some help from LBL
  • Maybe can resume loading of modules in December but guess that more likely January before really ramped up
  • Must increase by 1.5-2 rate of stave loading and testing, which is done at Marseille, Wuppertal and Genoa.
  • Plans how to do this but will be a challenge
  • Goal is to reach loading of 4 staves per week and testing of 5 per week.
slide11

Schedule version 7.09

  • Reasons for change?
    • Delays accumulated with ID services (especially pipes on barrel calorimeter)
    • Barrel calorimeter moves to z=0 on 26 October. Installation of ID services (type II/III) follows – critical path for all ATLAS.
    • Field map of solenoid needs both EC calorimeters
    • Install pixel system as late as possible.
  • Off-detector systems need to be in place for barrel then end cap commissioning
  • ID barrel and EC integration should keep working to previous RFI dates
slide13

B-calo

C

today

slide14

B-calo

26 October 05

slide15

TGC1

C-calo

B-calo

TAS-C

B-map

26 April 06

slide16

TGC1

C-calo

B-calo

TAS-C

B-ID

11 May 06

slide17

TGC1

MDT

TGC2

C-calo

B-calo

TAS-C

B-ID

30 June 06

slide18

TGC1

MDT

TGC2

C-calo

B-calo

TAS-C

B-ID

3 July 05

slide19

TGC1

TGC2

MDT

C-calo

B-calo

TAS-C

C-ID

B-ID

5 July 06

slide20

TGC1

TGC2

MDT

C-calo

B-calo

TAS-C

C-ID

B-ID

6 July 06

slide21

TGC1

TGC2

MDT

C-calo

B-calo

TAS-C

C-ID

B-ID

10 July 06

slide22

TGC1

TGC3

MDT

TGC2

ECT-C

JD

C-calo

B-calo

SWC

TAS-C

C-ID

B-ID

19 December 06

slide23

TGC3

TGC1

MDT

TGC2

ECT-C

JD

C-calo

B-calo

SWC

TAS-C

C-ID

B-ID

slide24

TGC3

TGC1

MDT

TGC2

ECT-C

JD

C-calo

B-calo

SWC

TAS-C

C-ID

B-ID

slide25

EO-C

TGC1

TGC3

MDT

TGC2

ECT-C

JD

C-calo

B-calo

SWC

TAS-C

JF-C

C-ID

B-ID

30 May 07

installation animation side a
Installation ‘animation’ – Side A
  • Partial subset with ID highlights…
slide27

B-calo

A

26 October 05

slide28

A-calo

B-calo

Mu-B

B-map

25 April 06

slide29

A-calo

B-calo

B-ID

11 May 06

slide30

A-calo

B-calo

B-ID

12 May 06

slide31

A-calo

B-calo

B-ID

15 May 06

slide32

ECT-A

A-calo

B-calo

B-ID

23 May 06

slide33

ECT-A

A-calo

B-calo

TAS-A

B-ID

2 August 06

slide34

ECT-A

A-calo

B-calo

TAS-A

A-ID

B-ID

4 August 06

slide35

ECT-A

A-calo

B-calo

TAS-A

A-ID

B-ID

5 August 06

slide36

ECT-A

A-calo

B-calo

TAS-A

A-ID

B-ID

slide37

ECT-A

A-calo

B-calo

TAS-A

A-ID

B-ID

slide38

ECT-A

A-calo

B-calo

TAS-A

A-ID

B-ID

slide39

TGC1

ECT-A

A-calo

B-calo

TAS-A

A-ID

B-ID

14 September 06

slide40

TGC1

ECT-A

A-calo

B-calo

TAS-A

A-ID

B-ID

23 October 06

Side A “closed”. Hope to have access to end of ID EC-A.

slide41

TGC1

ECT-A

A-calo

B-calo

TAS-A

A-ID

B-ID

slide42

TGC1

TGC3

MDT

TGC2

ECT-A

A-calo

B-calo

TAS-A

A-ID

B-ID

Lots of steps for big wheels to get to here…

slide43

TGC1

TGC3

MDT

TGC2

ECT-A

A-calo

B-calo

TAS-A

A-ID

B-ID

Reopen to get pixels in…

slide44

TGC1

TGC3

MDT

TGC2

ECT-A

A-calo

B-calo

TAS-A

A-ID

B-ID

slide45

TGC1

TGC3

MDT

TGC2

ECT-A

A-calo

B-calo

TAS-A

pixel

A-ID

B-ID

13 February 07

slide46

TGC1

TGC3

MDT

TGC2

ECT-A

A-calo

B-calo

TAS-A

pixel

A-ID

B-ID

slide47

TGC1

TGC3

MDT

TGC2

ECT-A

A-calo

B-calo

TAS-A

pixel

A-ID

B-ID

slide48

TGC1

TGC3

MDT

TGC2

ECT-A

JD

SWA

A-calo

B-calo

TAS-A

pixel

A-ID

B-ID

slide49

TGC1

TGC3

MDT

TGC2

ECT-A

JD

SWA

A-calo

B-calo

TAS-A

pixel

A-ID

B-ID

slide50

TGC1

TGC3

EO-A

MDT

TGC2

ECT-A

JD

SWA

A-calo

B-calo

TAS-A

JF-A

pixel

A-ID

B-ID

Used to be April 2007

20 June 07

schedule
Schedule

Side C

Side A

service panels
Service Panels
  • Production ongoing in 77A
  • Goal is to complete production by June 2006 but don’t have enough experience yet to make a credible schedule
  • But rate will have to increase to meet June 2006 goal
  • Note that some assembly(optical fibers) will only take place at CERN
  • Schedule is tight, even with revised installation schedule.
lbnl work at cern in next year
LBNL Work at CERN in Next Year
  • Finish Pixel Support Tube installation
  • Receive disks, use first for extended system test of 10% of system with mostly real components(cooling, readout, ….)
  • Receive service panels, install fibers and checkout
  • Services installation – a huge job, some LBNL role
  • Assist in barrel repair and later barrel integration(need to double rate here also)
  • In general, EU groups will be very busy with barrel rescue, try to offload
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