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New ATLAS VI Mechanical Tolerances

New ATLAS VI Mechanical Tolerances. 1. Insertable B-Layer (IBL). Current IST support. IBL Staves. Beam Pipe 45mm ID . IBL Inner Support Tube (IST) . 2. Sag - Proposed 45ID. IP. Self weight + heaters (34.23N ). B. A. services (100 N). services (100 N). Thermal F A (236N).

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New ATLAS VI Mechanical Tolerances

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  1. New ATLAS VI Mechanical Tolerances 1

  2. Insertable B-Layer (IBL) Current IST support IBL Staves Beam Pipe 45mm ID IBL Inner Support Tube (IST) 2

  3. Sag - Proposed 45ID IP Self weight + heaters (34.23N ) B A services (100 N) services (100 N) Thermal FA (236N) 720.5 720.5 MB(31.4N) 2073 2073 3425 3425 7300 Convergence at element size of 0.25m in Ansys 3

  4. Mechanical Tolerances for Aperture Calculation Survey* Gap between supports and IST to allow sliding IST Beam Pipe Sag between supports Tolerances on supports Inbuilt offset between centre of beam pipe and beam centre* End to end concentricity and circularity 4 *Included for information only

  5. Mechanical Tolerances for Aperture Calculation 5

  6. Summary for ATLAS Aperture Tolerances • Leaves 2.8 mm available for stability of cavern during run and between alignments 6

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