Barrel Support Structure and Barrel Integration Preparations

Doug Benjamin

Duke University HEP

Barrel Support Structure (BSS) Fabricated in Russia Components – A side

and C side end Frames Inner cylinder Outer cylinder (in two

halves)

Duke’s Role in BSS assembly Integral part of small team

(6 people – Jack Fowler and DB) Jack Fowler – one of two

engineers DB – physicist responsible

Verify the BSS assembly Frame

Develop and verify BSS assembly JF designed inner cylinder

flange.

Duke’s Role in BSS assembly (Cont.) Measure individual

BSS components Analyze the

measurement results

Frame 1 "A Inside" Mounting Hole Deviation from Nominal

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Deviation from nominal in module mounting holes by type (in mm)

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Fail cut

Frame 1 "A Outside" Mounting Hole Deviation from Nominal

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More

Devation from nominal in module mounting holes by type (in mm)

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T1 inner T1 outer T2 inner T2 outer T3 inner T3 outer

Duke’s Role in BSS assembly (Cont.) Shield the BSS

components Assemble the BSS Verify the BSS

alignment results

Preparations for integration DB was physicist

reponsible for integration Developed the procedures

to be used during integration

Verified the procedures DB and JF produced a

lengthy list of items to be finished before integration. This list was adopted by an

internal review committee on barrel integration readiness

Preparations for integration (cont.) Prepared the infrastructure

require for integration (scolding, gas lines, HV lines, HV software, module protection)

Prepared the modules for integration (Capacitor insertion)

First module permanently installed June 2004

DB passes responsibility for Barrel integration to Chiho Wang during June 2004DB could not travel as much (~

60% of time at CERN) for family reasons.

Conclusions Duke played a vital role in the BSS assembly Without efforts of JF and DB BSS assembly and

verification would have not happened in a timely manner.

DB and JF made crucial and significant contributions to preparations for the start of integration. This required that both spend large amounts of time at CERN for the past year (> 6 months each).

Excellent preparation for integration has meant that integration has gone smoothly (see Chiho’s talk).