1. VTX Half LAYER 4 LAYER 3 LAYER 1 LAYER 2 EACH LAYER’S BARRELL MOUNT NEEDS TO BE REFERENCED TO KINEMATIC MOUNTS AND IT’S MOUNTED LADDERS

2. BARREL SECTION FACE SKIN INSTALLED NEED TO FIND A SURVEY POINT ON EACH BARRELL MOUNT THAT IS VISIBLE WITH FACE SKIN INSTALLED

3. Layer 1 Removal from Assembly Fixture LAYER 1 LADDER’S CHIPS SHOULD BE SURVEYED TO THEIR BARRELL MOUNTS IN THE ASSEMBLY FIXTURE CHIPS BARREL MOUNT

4. Pixel Ladder Assembly CHIPS TO BE SURVEYED

5. Pixel Ladder Assembly Close-up CHIPS

6. Layer 1 EDGE VIEW SURVEY SMALL CHIPS ON LADDER

7. Layer 2 Assembly Fixture LAYER 2 CHIPS SURVEYED TO BARRELL MOUNT’S PINS IN ASSEMBLY FIXTURE MOUNT PINS

8. Layer 2 EDGE VIEW PIN

9. Layer 1 & 2 Mated

10. Layer 1&2 Joined

11. Layer 3

12. EDGE VIEW

13. Layer 4

14. EDGE VIEW

15. VTX Installed on Rails (Final Survey position in Chemistry?) EACH KINEMATIC MOUNT SHOULD HAVE A SURVEY TARGET

16. 2 Survey telescopes to be mounted on a 6 inch channel which spans between the north east and south east lead absorbers. Angled brackets to mount the channel horizontally will be needed. With a telescope at both ends of the channel and 2 more on the IR base rails will allow the surveyors to get an accurate survey and alignment of the 2 detector ½’s