ILD HCAL Mechanical Integration HCAL Main Meeting Kirsten

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

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

Overview Principle of mechanical concept Results of FEM calculation Impact of results for the

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

ILD detector -Mechanical concept- • TESLA/ ILD detector: Similar absorber structure • TESLA concept

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

Calorimeter barrel • • Height/ length of barrel: 5. 6 m/ 4. 6 m

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 01/07/2008 HCAL Main Meeting- Mechanical Integration 4

Calorimeter module Side panel: 3 mm thickness Screw size: M 6 Advantage • Slim

Calorimeter module Side panel: 3 mm thickness Screw size: M 6 Advantage • Slim support structure (small amount of -cracks) Disadvantages • Uncertainties regarding stability • High tolerance requirements (e. g. holes for screws, flatness of absorber plates) 01/07/2008 HCAL Main Meeting- Mechanical Integration 5

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

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

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

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

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

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

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

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

HCAL module Horizontal hanging Maximum deformation: 0. 09 mm Maximum stress (von Mises): 13.

HCAL module Horizontal hanging Maximum deformation: 0. 09 mm Maximum stress (von Mises): 13. 9 N/mm² 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 01/07/2008 HCAL Main Meeting- Mechanical Integration 10

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

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

Barrel -Standing- Maximum deformation: 18. 5 mm Maximum stress (von Mises): 645 N/mm² 01/07/2008

Barrel -Standing- Maximum deformation: 18. 5 mm Maximum stress (von Mises): 645 N/mm² 01/07/2008 HCAL Main Meeting- Mechanical Integration 12

Barrel -fixation/ including chambers- Maximum deformation: 2. 9 mm Maximum stress (von Mises): 263

Barrel -fixation/ including chambers- Maximum deformation: 2. 9 mm Maximum stress (von Mises): 263 N/mm² 01/07/2008 HCAL Main Meeting- Mechanical Integration 13

ECAL: weight load in one line Maximum deformation: 6. 18 mm Maximum stress (von

ECAL: weight load in one line Maximum deformation: 6. 18 mm Maximum stress (von Mises): 295 N/mm² 01/07/2008 HCAL Main Meeting- Mechanical Integration 14

Brass Cu. Zn 38 Pb 2 Maximum deformation: 6. 35 mm Maximum stress (von

Brass Cu. Zn 38 Pb 2 Maximum deformation: 6. 35 mm Maximum stress (von Mises): 183 N/mm² (Steel: 2. 9 mm/ 170 mm²) 01/07/2008 HCAL Main Meeting- Mechanical Integration 15

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

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

HCAL module -with staggered spacer/ gap 7 mm- Horizontal hanging Vertical hanging Maximum deformation:

HCAL module -with staggered spacer/ gap 7 mm- Horizontal hanging Vertical hanging Maximum deformation: 0. 7 mm Maximum deformation: 0. 4 mm Maximum stress (von Mises): 116 N/mm² Maximum stress (von Mises): 97 N/mm² Module standing Maximum deformation: 0. 6 mm Maximum stress (von Mises): 91 N/mm² 01/07/2008 HCAL Main Meeting- Mechanical Integration 17

HCAL barrel -8 modules/ gap 7 mm- Maximum deformation: 2. 15 mm Maximum stress

HCAL barrel -8 modules/ gap 7 mm- Maximum deformation: 2. 15 mm Maximum stress (von Mises): 115 N/mm² 01/07/2008 HCAL Main Meeting- Mechanical Integration 18

HCAL module -without spacer/ gap 14 mm- Horizontal hanging Maximum deformation: 1. 64 mm

HCAL module -without spacer/ gap 14 mm- 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 Interesting effect: When the side panel changes from 3 to 5 mm, the deformation changes from 1. 38 mm to 1. 36 mm! 01/07/2008 HCAL Main Meeting- Mechanical Integration 19

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

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

HCAL module -non pointing/ right angle. Vertical hanging Maximum deformation: 5. 0 mm Maximum

HCAL module -non pointing/ right angle. Vertical hanging Maximum deformation: 5. 0 mm Maximum stress (von Mises): 79 N/mm² 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 01/07/2008 HCAL Main Meeting- Mechanical Integration 21

HCAL barrel -non pointing/ right angle- Maximum deformation: 10. 4 mm Maximum stress (von

HCAL barrel -non pointing/ right angle- Maximum deformation: 10. 4 mm Maximum stress (von Mises): 158 N/mm² 01/07/2008 HCAL Main Meeting- Mechanical Integration 22

Effects of changed parameter Bigger side panel (3 mm 5 mm): Spacer no yes

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

Next steps • Define more detailed design: module connection, support of HCAL inside the

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

Conclusion • Calculations were made for a wide range of possibilities • Concept in

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/ nonponting etc. ) 01/07/2008 HCAL Main Meeting- Mechanical Integration 25