1. www.sgh.com Keck II Telescope Progress Update 1 21 November 2011 Amy Jagaczewski Andrew Sarawit

2. 1. Purpose Progress update for Keck II Telescope ANSYS model as of 21 November 2011 2

3. 2. Method of Approach Develop ANSYS model of Keck II sub-assemblies based on drawings received through correspondence. Define working points and member lines for sub-assembly followed by definition of member sections and orientations. 3

4. 3. Mirror Cell Assembly 4 Working Points Defined Member Lines Defined Member Sections and Orientations Defined

5. 3.1 Reference Drawings 1.Drawing No. 4.1 – Mirror Cell Top Layer Plan 2.Drawing No. 4.2 – Mirror Cell Middle Layer Plan 3.Drawing No. 4.3 – Mirror Cell Bottom Layer Plan 4.Drawing No. 4.4 – Mirror Cell Upper Diagonals Plan 5.Drawing No. 4.5 – Mirror Cell Lower Diagonals Plan 6.Drawing No. 4.6 – Actuator Nodes #5, 7, & 64 Plans 7.Drawing No. 4.7 – Actuator Nodes #12, 15, & 67 Plans 8.Drawing No. 4.8 – Actuator Nodes #22, 26, & 73 Plans 9.Drawing No. 4.9 – Actuator Nodes #18, 19, & 24 Plans 10.Drawing No. 4.10 – Actuator Nodes #20, 21, & 25 Plans 11.Drawing No. 4.11 – Actuator Nodes #10, 11, & 14 Plans 12.Drawing No. 7013-E18 – Mirror Cell Top Layer 13.Drawing No. 7013-E19 – Mirror Cell Upper Diagonals 14.Drawing No. 7013-E20 – Mirror Cell Middle Layer 15.Drawing No. 7013-E21 – Mirror Cell Lower Diagonals 16.Drawing No. 7013-E22 – Mirror Cell Bottom Layer 17.Drawing No. 7013-L502 – Mirror Cell Top Layer Plan 5

6. 3.2 Top Layer 6

7. 3.3 Upper Diagonals 7

8. 3.4 Middle Layer 8

9. 3.5 Lower Diagonals 9

10. 3.6 Bottom Layer 10

11. 4. Yoke 11 Working Points Defined Member Lines Defined

12. 4.1 Reference Drawings 1.Drawing No. 7013-8300 (1/5) – Yoke-Nasmyth Platform Support-Left Side 2.Drawing No. 7013-8300 (5/5) – Yoke-Nasmyth Platform Support-Right Side 3.Drawing No. 6.1 – Yoke Layout Plan 4.Drawing No. 6.2 – Yoke Framing Elevations 5.Drawing No. 6.3 – Yoke Framing Elevations II 12

13. 4.2 Plan View 13

14. 4.3 Elevation View (Front) 14

15. 4.4 Elevation View (Right Side) 15

16. 5. Tertiary Tower 16 Working Points Defined Member Lines Partially Defined

17. 5.1 Reference Drawings 1.Drawing No. KE-06010 (22/26) – Tertiary Tower General Arrangement – Rev. B 2.Drawing No. KE-06010 (23/26) – Tertiary Tower Plan – Level 1 to 5 – Rev. B 3.Drawing No. KE-06010 (25/26) – Tertiary Tower Plan Layout at Level 6 to 10 – Rev. B 17

18. 5.2 Plan View 18

19. 5.3 Elevation View (Front) 19

20. 5.4 Elevation View (Right Side) 20

21. 6.1 View of Entire Assembly (Front Elevation) 21

22. 6.2 View of Entire Assembly (Plan) 22

23. 6.3 View of Entire Assembly (Right Side Elevation) 23

24. 7. Questions/Comments 24 Clarification of coordinates for working points 277-282 needed for interface of mirror cell with tertiary tower at bottom layer of mirror cell.