1. Tracker Support Tube Tracker EDR November 15th/16th 2000 M.Oriunno CERN/EP Tracker Support Tube Marco Oriunno CERN/EP Division on behalf of Tracker Integration Group H.Breuker, M.Oriunno, P.Petagna, H.Postema CMS Tracker EDR

2. Tracker Support Tube Tracker EDR November 15th/16th 2000 M.Oriunno CERN/EP Silicon Strip Tracker: Tracker Support Tube L ~ 5,4 meters Outer Barrel Inner Barrel Endcap Pixel  ~ 2,4 meters

3. Tracker Support Tube Tracker EDR November 15th/16th 2000 M.Oriunno CERN/EP Outline  Main Features  Requirements and materials  Calculations  Manufacturing Study  Technical Specifications

4. Tracker Support Tube Tracker EDR November 15th/16th 2000 M.Oriunno CERN/EP CF/Nomex Sandwich Shell, 30mm thick CF/ Rails filled with glass wool Glass/Epoxy profiles supporting the services and the Thermal screen TST Features Rails

5. Tracker Support Tube Tracker EDR November 15th/16th 2000 M.Oriunno CERN/EP Requirements and Materials High radiation transparency i.e. low mass density  High Stiffness E i.e. E/  High position stability in the time i.e. low CTE and CME Radiation Hardness

6. Tracker Support Tube Tracker EDR November 15th/16th 2000 M.Oriunno CERN/EP For lightweight structures, as the Tracker, a sandwich shell cylinder is the best compromise between weight and stiffness. The limited space available for the structure, makes definitively sandwich construction the best choice.

7. Tracker Support Tube Tracker EDR November 15th/16th 2000 M.Oriunno CERN/EP Finite Element calculations

8. Tracker Support Tube Tracker EDR November 15th/16th 2000 M.Oriunno CERN/EP Skin Material Properties T300/Epoxy

9. Tracker Support Tube Tracker EDR November 15th/16th 2000 M.Oriunno CERN/EP FEA Results

10. Tracker Support Tube Tracker EDR November 15th/16th 2000 M.Oriunno CERN/EP Seismic calculations: 0.15g horizontal load

11. Tracker Support Tube Tracker EDR November 15th/16th 2000 M.Oriunno CERN/EP Static and Seismic Animations

12. Tracker Support Tube Tracker EDR November 15th/16th 2000 M.Oriunno CERN/EP Materials and Geometry Effects } T300 } M40J

13. Tracker Support Tube Tracker EDR November 15th/16th 2000 M.Oriunno CERN/EP Manufacturing Composite Structures can be manufactured following different processes, achieving the same results: –Vacuum Moulding –Autoclave –Filament Winding The crucial item in the definition of manufacture costs is the tooling design The cost of raw material is only 20% of the total cost High performance materials affect the total costs in terms of complicated curing procedure For high performance materials, the quality of the final product depends strongly on the experience of the manufacturer

14. Tracker Support Tube Tracker EDR November 15th/16th 2000 M.Oriunno CERN/EP Manufacturing Study I The conventional way to manufacture sandwiches is the mould process with curing in an autoclave, using moulds made of carbon fibres reducing the thermal mismatch between the moulds and the sandwich during the cure, if the final tolerance on the dimensions is tight. Processes like filament winding require relatively simple tooling, allowing the production of the entire cylinder in one go Filament winding is widely used for manufacturing of medium size fuselages in the aeronautical industry where the size of the series pays off the manufacturing cost of the tooling: this is not the case for the TST where only one piece has to be made

15. Tracker Support Tube Tracker EDR November 15th/16th 2000 M.Oriunno CERN/EP Manufacturing Study II Medium-size companies, having experience on same size structures have been contacted to produce a preliminary study on the technological feasibility. The proposed solution are very similar: Composite Optic Industries(USA) Plyform (Italy)  Composite Tooling and Structure (UK)

16. Tracker Support Tube Tracker EDR November 15th/16th 2000 M.Oriunno CERN/EP

17. Tracker Support Tube Tracker EDR November 15th/16th 2000 M.Oriunno CERN/EP

18. Tracker Support Tube Tracker EDR November 15th/16th 2000 M.Oriunno CERN/EP Technical Specifications’ Index 1INTRODUCTION 2SCOPE OF THE TENDER 3GENERAL CONDITIONS FOR TENDERING AND CONTRACTING 4OVERALL DESCRIPTION 5DETAILED DESCRIPTION 6DOCUMENTS 7QUALITY CONTROL AND TESTS 8PACKING, TRANSPORT AND DELIVERY Part II  QUALIFICATION CRITERIA Part III  TECHNICAL QUESTIONNAIRE