1. SVT Module design
F.Bosi

2. SVT L1-L5 Module design
First attempt to model L1-L5 SVT modules starting from BaBar design:
same radial position for all layers
used same width of BaBar sensors/modules to keep the same the transversal (r-phi) section (# of modules, overlap…)
modified the length (z) of the modules to extend the coverage down to 300 mrad.
For arch modules barrel length extended, while wedge sensors are kept identical to the BaBar ones, with the same angle w.r.t the barrel as in the BaBar forward modules.
Some good news (layers 4-5)
Some bad news (layers1-2)

3. BaBar SVT lateral section

9. Layer 1

10. Layer 1

11. Layer 1

12. Layer 2

13. Layer 2

14. Layer 2

15. Layer 3

16. Layer 3

17. Layer 3

18. Layer 4B

19. Layer 4 A-B

20. Layer 5 A-B
300 mrad cone
Services space 20 mm

22. General layout – side view

23. General side section

24. Shielding layout

25. SVT and Transition Card

26. SVT side section

27. SVT plan-section

28. SVT dimensions in Fastsim – N. Neri

29. L1-L5 barrel modules dimensions
Layer
Coverage 300 mrad
Radius cm
modules
Module width from BaBar (cm)
Barrel module length - Fastsim Neri (cm)
Barrel modules length - Bosi new design (preliminary) (cm) 1
0.3
3.3 6
4.13
21.466
21.478 2 4
4.94
25.992
26.278 3
5.9
7.15
38.276
38.57 4a 12 16
5.28
44.57
45.795 4b
12.4
47.942 5a 14 18
61.81
61.304 5b
14.4
63.584

30. L1-L5 full modules length
Module length - Fastsim Neri (cm) (barrel + 2 wedges)
modules length - Bosi new design (preliminary) (cm) (barrel + 2 wedges)
Modules lehgth without arch shape cm
Layer 4a
59.389
77.585
Layer 4b
61.536
80.172
Layer 5a
74.898
90.516
Layer 5b
77.178
93.103