1. Vibration study report 4/10/2013 LCLS-II Physics meeting A. Lutman, J. Turner

2. 2 Talk Overiew Analysis description Results

3. 3 Scheme I - Simulation Fit average First moment Fit 1 average Fit 2 average First moment Area Two Gaussians: fit poorly Asymmetric Gaussian: nice but lengthy Two separated Gaussians fit well each feature Image at MEC

4. 4 Reference run 35 (no works during this run) Left feature position X Time ~(27k shots) Frequency ~(27k shots) “Slice” standard deviation “full set” standard deviation Samples with no image, and missing timestamps have been filled with the average of the adjacent samples. Frequencies higher than “baseline” Low: 0-2 Hz 13.3 Hz 16.5 Hz 19.5-20.2 Hz 25.17 Hz 29.5 Hz 31.4 Hz 47.2 Hz 47.8 Hz 49.4 Hz 57.5 Hz 58.8 Hz 59.1 Hz 59.3 Hz

5. 5 Sample runs (run 37) Run 37, another reference after moving mirrors Run 41 (during Jackhammer) For the analysis only the longest consecutive interval without big disturbances has been considered, for each dataset.

6. 6 Jackhammer (4-7)

7. 7

8. 8 Right spot Left spot X positionY position

9. 9 Backhoe (8-13)

10. 10 Backhoe (8-12) Right spot Y position

11. 11 Backhoe (8-13) Right spot Left spot X positionY position

12. 12 Concrete Vibrator (14-18)

13. 13 Concrete Vibrator (14-18)

14. 14 Concrete Vibrator (14-18) Right spot Left spot X positionY position

15. 15 Concrete Vibrator (14-18) Y-Low frequencies Y centroid 0 to 6 Hz range

16. 16 Plate Compactor (19-22)

17. 17 Plate Compactor (19-22)

18. 18 Plate Compactor (19-22)

19. 19 Core Drilling (23-26)

20. 20 Core Drilling (23-26)

21. 21 Backhoe (27-30)

22. 22 Backhoe (27-30)

23. 23 Jackhammer (31-34)

24. 24 Jackhammer (31-34)

25. 25 Jackhammer (38-41) – New reference 37

26. 26 Jackhammer (38-41) – New reference 37

27. 27 Backhoe (43,45) – New reference 37

28. 28 Backhoe (43,45) – New reference 37

29. 29 Plate Compactor (47-49) – New reference 37

30. 30 Plate Compactor (47-49) – New reference 37

31. 31 Concrete Vibrator(50,52-54) – New reference 37

32. 32 Concrete Vibrator(50,52-54) – New reference 37

33. 33 Jackhammer (54-57,59)– New reference 37

34. 34 Jackhammer (54-57,59)– New reference 37 12 Hz

35. 35 Core Drilling (60-63) – New reference 37

36. 36 Core Drilling (60-63) – New reference 37

37. 37 Backhoe (64-67) – New reference 37

38. 38 Backhoe (64-67) – New reference 37 29.7-30.3 Hz