I swapped out IO_MB_M3, which is a 2 inch steering mirror just before the power rotation stage at the North end of the PSL. The new optics position was slightly different than the old optic's position. I used my GigE cameras and the single bounce of IMC_IN off MC1 to the IMC WFS, to restore the alignment of IMC_IN.
Here are the changes in the IMC, measured by how many urads the three IMC mirrors moved, and what that calculates to be in mm.
| 15 Jan 2019 | 9:00 UTC | 21:13 UTC | |||
| optic DOF | urad | urad | diff urad | rad | mm |
| mc1 p | -299.2 | -300.36 | -1.16 | -1.16E-06 | -0.05 |
| mc1 y | -1000.5 | -1001.2 | -0.70 | -7.0E-07 | -0.03 |
| mc2 p | 138.7 | 139.3 | 0.60 | 6.0E-07 | 0.05 |
| mc2 y | 629.9 | 629.2 | -0.70 | -6.9E-07 | -0.01 |
| mc3 p | -651 | -652 | -1.00 | -1.0E-06 | -0.05 |
| mc3 y | -1281 | -1279 | 2.00 | 2.0E-06 | 0.09 |
Changes in the beams on the cameras are listed below:
NOTE: GigE 1 is the PMC Trans beam, and due to temperature changes it's beam changed, which influences the beam positions on the other two cameras.
| 15 Jan 2019 | 9:00 UTC | 21:13 UTC | |
| pixels | pixels | diff_pixels | |
| GigE 1 x | 329.5 | 329.8 | 0.30 |
| GigE 1 y | 159.9 | 160.85 | 0.95 |
| GigE 2 x | 325.3 | 325.6 | 0.30 |
| GigE 2 y | 247.2 | 251.8 | 4.60 |
| GigE 3 x | 271.7 | 267.2 | -4.50 |
| GigE 3 y | 274.3 | 280 | 5.70 |
The camera image pixels have not yet been calibrated, so that they can be displayed in either mm, or possibly the angle change.
Robert added damping to the bottom periscope mirror and IO_MB_M3 during this time.
As time was limited, I'll plan to add a picture of IO_MB_M3 next week.
- Cheryl, Robert