barrel integration status

Chiho Wang ATLAS TRTDuke University CERN, Sep. 2004

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Barrel integration status


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Recent Time line

Jun 28 – 1st module installed July 21 – all but 2 type 1

modules installed 1 cooling sleeve problem 1 HV problem (M1.35)

Aug. 2 – type 1 complete Fixed cooling sleeve Gave up M1.35, use M1.26

Aug. 6 – 1st type 1 electronics installed, complete with readout & LV/cooling interlock.

Aug. 11 – 1st type 2 installed Aug. 31 M1.26 removed, to be

replaced with M1.35

Sep. 2 snap shot: Type 1 - Waiting for M1.35 Type 2 - 21 modules installed, 7

more in SR being prepared. Type 3 - 4 modules in SR being

prepared.


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Module placement in BSS

Evenly distribute dead channels … Observe constrains or preferences on HV feeding side due to anomaly

in HV kapton.


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Module preparation

Capacitor installation (~1-2 days/module)

Insert capacitors Check capacitor

connectivity Check HV traces HV test: caps + wires Seal capacitors

Pre-insertion prep. (6 modules/day/2 person)

Check ground wire Check cooling sleeve Check mounting holes Active gas fittings,

custom made for each module: connection & leak test

Glue purging gas gasket Tape HV kapton for

protection Glue thermal sensors as

needed (4 modules each type)


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Module installation

Procedures & tests Fold HV kapton and cover with

protection plates Insert module & fix one corner Set module z position to middle of

BSS Fix module 2nd corner & attach set

screws Check purging gas flow

Type 1 1.5 L/min < 10% loss Type 1+2 1.5 L/min < 15% loss Type 1+2+3 0.5 L/min < 20% loss

Unfold HV kapton & check traces Attach & glue active gas fittings Plug & seal unused active gas

inlets. Leak test active gas volume

(1mB/B/min) Install protection boards HV test Check active gas path for

obstruction (flow rate test)


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Non-routine module work

Components modification Peek tubes for module

cooling reduced from 0.123”-0.127” 0.116”-0.120” (done)

De-magnetization of active gas inlet plugs (started on type 2 modules)

Fuse box brackets dimension change

Fuse box screws changing from Nylon to Ultem

Module repair: Wire removal (2 bad wires +

some retroactive decisions from acceptance group)

HV trace repair (1) Cooling sleeve replacement

(3) Re-glue detached shell &

divider (1) Tension plate socket

replacement (2)


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Beyond modules

Data Base: Access data base in use for progress tracking.

MTF: Migration in progress. Preliminary tree structure available for review.

Upgrade for space frame bracing (needed for type 3 installation): In progress, some components ready to be installed.

Outer cylinder is yet to be copper shielded. Gas/Cooling manifold: Expect to have drawings

reviewed and submitted for fabrication this month.


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Electronics installation

Protection boards - 21 type 1 modules installed. 6000 more boards coming.

FE assembly – P1.29 installed. 17+ more being prepared

DCS : HV, LV, thermal sensors, cooling interlock (CIL) … operational.


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Summary

More than half of the modules have been installed! Procedures are understood and becoming routine. Module installation expect to finish by the end of

the year Electronics installation has begun.

barrel integration status

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