1. CLIC Common RF-girder study
Sami Haavisto,

2. My assignment Study the possibilities and options for common RF-girder
Manufacturing
Tolerances
Design
(Alignment and support)
(Fixation/snake system to other modules)
(Materials)

3. Current focus has been
Simple models of different options for the girder
Simple stress and deformation simulations to the models
6 different models with simulations already made
Standard sections (IPE, etc.)
Stainless steel for weld options, Epument 145/B for cast
Supported from both ends of DB and MB girder
Simulations: 300kg weight on MB, 120kg on DB

4. Weld option #1
Weight 22.3kg (for comparison)
Max deformation 35μm

5. Weld option #2 Weight 45.6kg Max deformation 41μm
Weights more and doesn’t bring any added benefit compared to other weld options

6. Weld option #3
Weight 23.2kg
Max deformation 36μm

7. Weld option #4
Weight 28.8kg
Max deformation 29μm

8. Cast option #1
Weight 43kg
Max deformation 8μm
Epument

9. Cast option #2
Weight 44.5kg
Max deformation 7μm
Epument

10. Next steps
A design of machined plate (components fixed to it, beam alignment with plate)
Tolerances possible and reasonable to achieve for girder
Eliminate unnecessary options
Simulations on effects of thermal expansion