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US ATLAS HL-LHC Upgrade Risk Scrubbing WBS 6.3.5 Strip Barrel Shells

US ATLAS HL-LHC Upgrade Risk Scrubbing WBS 6.3.5 Strip Barrel Shells. Todd Claybaugh Level 3 Manager and CAM Lawrence Berkeley National Laboratory. Strip Barrel Shells. This subsystem includes the Layer 3 and Layer 2 Strip Barrels.

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US ATLAS HL-LHC Upgrade Risk Scrubbing WBS 6.3.5 Strip Barrel Shells

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  1. US ATLAS HL-LHC Upgrade Risk ScrubbingWBS 6.3.5Strip Barrel Shells Todd Claybaugh Level 3 Manager and CAM Lawrence Berkeley National Laboratory US ATLAS HL-LHC 2019 Risk Scrubbing

  2. Strip Barrel Shells • This subsystem includes the Layer 3 and Layer 2 Strip Barrels. • Parts for these large carbon fiber structures will be fabricated at a vendor, and the assembly will be either at that vendor, or in-house at LBNL. • The size of the shells and flanges ~2 meters in diameter make them difficult to procure, because few vendors have an autoclave large enough to process the parts. US ATLAS HL-LHC 2019 Risk Scrubbing

  3. Global Mechanics Overview Strip Barrels Outer Cylinder PST Forward US ATLAS HL-LHC 2019 Risk Scrubbing

  4. L3 and L2 Detail • Each Strip Barrel layer is a complex, precision assembly L2, 1.44 m diameter L3, 1.92 m diameter US ATLAS HL-LHC 2019 Risk Scrubbing

  5. Technical Challenges • Large diameter, thin walled shells are difficult to manufacture, our shells are 0.6 millimeters thick and 1.5 and 2 meters in diameter. • Complex 3D layups for flanges help structural performance, but add difficulty to processing the parts and could result in a part failure and loss of material. US ATLAS HL-LHC 2019 Risk Scrubbing

  6. Risk Description: ITEM US ATLAS HL-LHC 2019 Risk Scrubbing

  7. Risk Description: ITEM US ATLAS HL-LHC 2019 Risk Scrubbing

  8. Risk Description: ITEM US ATLAS HL-LHC 2019 Risk Scrubbing

  9. Risk Description: ITEM US ATLAS HL-LHC 2019 Risk Scrubbing

  10. Additional Risks • If the selected vendor requires design changes, the engineering cost will be added • If the selected vendor lead time exceeds schedule, there will be a delay • If locking point bonding takes more time than anticipated, then the final delivery to CERN will be delayed US ATLAS HL-LHC 2019 Risk Scrubbing

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