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01/07/2008HCAL Main Meeting- Mechanical Integration1 ILD HCAL Mechanical Integration HCAL Main Meeting Kirsten Kschioneck, DESY.

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Presentation on theme: "01/07/2008HCAL Main Meeting- Mechanical Integration1 ILD HCAL Mechanical Integration HCAL Main Meeting Kirsten Kschioneck, DESY."— Presentation transcript:

1 01/07/2008HCAL Main Meeting- Mechanical Integration1 ILD HCAL Mechanical Integration HCAL Main Meeting Kirsten Kschioneck, DESY

2 01/07/2008HCAL Main Meeting- Mechanical Integration2 Overview  Principle of mechanical concept  Results of FEM calculation  Impact of results for the concept

3 01/07/2008HCAL Main Meeting- Mechanical Integration3 TESLA/ ILD detector: Similar absorber structure TESLA concept existed: learning from TESLA concept ILD detector -Mechanical concept-

4 01/07/2008HCAL Main Meeting- Mechanical Integration4 Calorimeter barrel Height/ length of barrel: 5.6 m/ 4.6 m Weight of one module: ≈ 14 t Weight of HCAL: ≈ 450 t Weight of HCAL + chambers + ECAL: ≈ 790 t

5 01/07/2008HCAL Main Meeting- Mechanical Integration5 Disadvantages Uncertainties regarding stability High tolerance requirements (e.g. holes for screws, flatness of absorber plates)  Side panel: 3 mm thickness  Screw size: M6 Advantage Slim support structure (small amount of  -cracks) Calorimeter module

6 01/07/2008HCAL Main Meeting- Mechanical Integration6 Octant with chambers (M. Reinecke)

7 01/07/2008HCAL Main Meeting- Mechanical Integration7 Chamber cross section (M. Reinecke)

8 01/07/2008HCAL Main Meeting- Mechanical Integration8 Chamber topview (M. Reinecke)

9 01/07/2008HCAL Main Meeting- Mechanical Integration9 FEM calculation -16 modules-

10 01/07/2008HCAL Main Meeting- Mechanical Integration10 HCAL module Vertical hanging Maximum deformation: 0.35 mm Maximum stress (von Mises): 43 N/mm² Module standing Maximum deformation: 0.7 mm Maximum stress (von Mises): 60 N/mm² Horizontal hanging Maximum deformation: 0.09 mm Maximum stress (von Mises): 13.9 N/mm²

11 01/07/2008HCAL Main Meeting- Mechanical Integration11 How are these positive results possible? compression ↔ tensile

12 01/07/2008HCAL Main Meeting- Mechanical Integration12 Maximum deformation: 18.5 mm Maximum stress (von Mises): 645 N/mm² Barrel -Standing-

13 01/07/2008HCAL Main Meeting- Mechanical Integration13 Maximum deformation: 2.9 mm Maximum stress (von Mises): 263 N/mm² Barrel -fixation/ including chambers-

14 01/07/2008HCAL Main Meeting- Mechanical Integration14 Maximum deformation: 6.18 mm Maximum stress (von Mises): 295 N/mm² ECAL: weight load in one line

15 01/07/2008HCAL Main Meeting- Mechanical Integration15 Brass CuZn38Pb2 Maximum deformation: 6.35 mm Maximum stress (von Mises): 183 N/mm² (Steel: 2.9 mm/ 170 mm²) Brass

16 01/07/2008HCAL Main Meeting- Mechanical Integration16 FEM calculation -8 modules-

17 01/07/2008HCAL Main Meeting- Mechanical Integration17 Horizontal hanging Maximum deformation: 0.7 mm Maximum stress (von Mises): 116 N/mm² Module standing Maximum deformation: 0.6 mm Maximum stress (von Mises): 91 N/mm² Vertical hanging Maximum deformation: 0.4 mm Maximum stress (von Mises): 97 N/mm² HCAL module -with staggered spacer/ gap 7 mm-

18 01/07/2008HCAL Main Meeting- Mechanical Integration18 Maximum deformation: 2.15 mm Maximum stress (von Mises): 115 N/mm² HCAL barrel -8 modules/ gap 7mm-

19 01/07/2008HCAL Main Meeting- Mechanical Integration19 Horizontal hanging Maximum deformation: 1.64 mm Maximum stress (von Mises): 88 N/mm² Module standing Maximum deformation: 1.38 mm Maximum stress (von Mises): 60 N/mm² HCAL module -without spacer/ gap 14 mm- Interesting effect:  When the side panel changes from 3 to 5 mm, the deformation changes from 1.38 mm to 1.36 mm!

20 01/07/2008HCAL Main Meeting- Mechanical Integration20 Non-pointing  From mechanical point of view possible.

21 01/07/2008HCAL Main Meeting- Mechanical Integration21 Horizontal hanging Maximum deformation: 1.1 mm Maximum stress (von Mises): 23 N/mm² Module standing Maximum deformation: 1.7 mm Maximum stress (von Mises): 50 N/mm² Vertical hanging Maximum deformation: 5.0 mm Maximum stress (von Mises): 79 N/mm² HCAL module -non pointing/ right angle-

22 01/07/2008HCAL Main Meeting- Mechanical Integration22 Maximum deformation: 10.4 mm Maximum stress (von Mises): 158 N/mm² HCAL barrel -non pointing/ right angle-

23 01/07/2008HCAL Main Meeting- Mechanical Integration23 Effects of changed parameter displacementstress Bigger side panel (3 mm  5 mm):   Spacer no  yes  From steel to brass:   Smaller gap (14 mm  7 mm):   Pointing yes  no    :big change  :moderate change  :small change

24 01/07/2008HCAL Main Meeting- Mechanical Integration24 Next steps Define more detailed design: module connection, support of HCAL inside the cryostat etc. Think about design and production of a model

25 01/07/2008HCAL Main Meeting- Mechanical Integration25 Conclusion Calculations were made for a wide range of possibilities Concept in general is possible but challenging Concept is adaptable for different requirements (material; pointing/ non- ponting etc.)


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