M. Gilchriese

Pixel Update

October 3, 2005

M. Gilchriese2

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

M. Gilchriese3

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 successfully

applied to several bare and loaded staves.– Strength to delamination increase

of ~6x for pull/torque.

• Third problem (August Crisis): Al pipe corrosion… production halted

M. Gilchriese4

MCC problem

M. Gilchriese5

Inspection

Clean: 32 staves Salted: 28 staves

Nickel peals off: 18 staves

M. Gilchriese6

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

M. Gilchriese7

More corrosion

M. Gilchriese8

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.

M. Gilchriese9

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

M. Gilchriese10

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.

M. Gilchriese11

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

M. Gilchriese12

Critical ID dates

Integration & tests in SR1 complete (Heinz P.)

Previous installation date

New 7.09 installation date

Change in installation date

Barrel 16 March 06 1 March 06 11 May 06 10 weeks

EC-C 26 June 06 25 May 06 6 July 06 6 weeks

EC-A 21 July 06 30 June 06 5 August 06 5 weeks

Pixels Not yet updated 5 Oct 06 13 Feb 07 4.5 months

M. Gilchriese13

B-calo

today

C

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B-calo

26 October 05

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B-caloC-caloT

AS

-CT

GC

1

26 April 06

B-map

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B-caloC-caloT

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B-ID

11 May 06

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B-caloC-caloT

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B-ID

30 June 06

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B-caloC-caloT

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B-ID

3 July 05

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B-caloC-caloT

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-C

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B-IDC-ID

5 July 06

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B-caloC-caloT

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B-IDC-ID

6 July 06

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B-caloC-caloT

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10 July 06

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B-caloC-caloT

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B-IDC-ID

ECT-C

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19 December 06

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B-caloC-caloT

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B-IDC-ID

ECT-CS

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B-caloC-caloT

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B-IDC-ID

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B-caloC-calo

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B-IDC-ID

ECT-C

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CJD

JF-C

30 May 07

EO

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Installation ‘animation’ – Side A• Partial subset with ID highlights…

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B-calo

26 October 05

A

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B-calo A-calo

B-map

25 April 06

Mu-

B

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B-calo A-calo

B-ID

11 May 06

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B-calo A-calo

B-ID

12 May 06

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B-calo A-calo

B-ID

15 May 06

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B-calo A-calo ECT-A

B-ID

23 May 06

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B-calo A-calo

ECT-A

B-ID

TA

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2 August 06

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B-calo A-calo

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4 August 06

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B-calo A-calo

ECT-A

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5 August 06

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B-calo A-calo

ECT-A

B-ID A-ID

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B-calo A-calo ECT-A

B-ID A-ID

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B-calo A-calo ECT-A

B-ID A-ID

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B-calo A-calo ECT-A

B-ID A-ID

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C1

14 September 06

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B-calo A-calo ECT-A

B-ID A-ID

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23 October 06

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

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B-calo A-calo ECT-A

B-ID A-ID

TA

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B-calo A-calo ECT-A

B-ID A-ID

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Lots of steps for big wheels to get to here…

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B-calo A-calo ECT-A

B-ID A-ID

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Reopen to get pixels in…

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B-calo A-calo

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B-calo A-calo

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pixel

13 February 07

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B-calo A-calo

ECT-A

B-ID A-ID

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pixel

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B-calo A-calo

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pixel

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B-calo A-calo ECT-A

B-ID A-ID

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pixel

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B-calo A-calo ECT-A

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pixel

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B-calo A-calo ECT-A

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JF-Apixel

20 June 07

EO

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Used to be April 2007

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Overall Disk Status

0

50

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6-Oct-03 14-Jan-04 23-Apr-04 1-Aug-04 9-Nov-04 17-Feb-05 28-May-05 5-Sep-05 14-Dec-05

Date

Modules

Bare Modules Actual

Burned-in Modules Actual

Sector Assembled Actual

Sector Tested Actual

Modules on Disks Planned

Modules on Disks Actual

Actuals as of September 26, 2005

Planning as of September 20, 2004

FE-I3 modules only

2-hit

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ScheduleTaskLoad/Test 2CExhaust Tube Welding/TestSurvey 2CLoad/Test 3CSurvey 3CRepair 1C sectorsLoad/Test 1CSurvey 1CPipe strain relief fab/attachExhaust/U-tube AttachCapillary Fab/Tune/AttachIntegration"System Test" @ LBLShip to CERN

Load/Test A-side 1st diskSurvey 1stLoad/Test A-side 2nd diskSurvey 2ndLoad/Test A-side 3rd diskSurvey 3rdExhaust/U-tube attachCapillary Fab/Tune/AttachIntegrationTestShip to CERN

February MarchOctober November December January

Side C

Side A

M. Gilchriese53Febr uar y 2004Ser vice PRR

E. Ander ssen LBNL

ATLAS Pixel DetectorSer vice Panel Component s

• The SQP Backbone ties al l assembl ies together and to PP1

• Heat Exchanger s ar e Loaded into (suppor ted by) the Backbone

• Ser vice Panel s (ISP/ OSP) ar e mounted to the Backbone

• Opto car ds and Fiber s can onl y be l oaded af ter SQP is near l y compl ete

EXTERN

AL

PP0 Coo l ingConnec t ions

M. Gilchriese54

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.

M. Gilchriese55

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

M. Gilchriese56