jenne.driggers@LIGO.ORG - posted 14:14, Thursday 01 August 2019 (50965)
Summary of spot positions before Tues and yesterday
Here is a quick summary of our spot positions on the test masses. One column is the positions that we had been using before this week's Tuesday maintenance camera bump, one column is the spots that gave good buildups at 2W yesterday which is also the set of positions that the initial alignment is currently set for, and the final column is the spots that were better at 37W yesterday.
For the most part, we are closer to the center of our optics at the current 37W positions than our previous 37W positions.
| Pre-Tuesday 2W and 37W | 2W Post-Tuesday | 37W Post-Tuesday | Displacement change at 37W Pre- vs. Post-Tuesday | |
| ITMX pit | P2L = -3.965 -> 21.7 mm | P2L = -0.1 -> 4.4 mm | P2L = -3.5 -> 19.6 mm | 2.1 mm closer to center |
| ITMY pit | P2L = -3.0 -> 17.4 mm | P2L = 0.8 -> 0.3 mm | P2L = -2.0 -> 12.9 mm | 4.5 mm closer to center |
| ETMX pit | P2L = 4.3 -> -15.7 mm | P2L = 0.7 -> 0.8 mm | P2L = 3.3 -> -11.1 mm | 4.6 mm closer to center |
| ETMY pit | P2L = 4.3 -> -15.7 mm | P2L = 0.7 -> 0.8 mm | P2L = 0.9 -> -0.2 mm | 15.5 mm closer to center |
| ITMX yaw | Y2L = 0.055 -> 0.2 mm | Y2L = 0.055 -> 0.2 mm | Y2L = 0.055 -> 0.2 mm | No change |
| ITMY yaw | Y2L = 0.0 -> 0 mm | Y2L = 0.0 -> 0 mm | Y2L = 0.0 -> 0 mm | No change |
| ETMX yaw | Y2L = 3.6 -> 13.2 mm | Y2L = 2.8 -> 10.3 mm | Y2L = 2.8 -> 10.3 mm | 2.9 mm closer to center |
| ETMY yaw | Y2L = 3.6 -> 13.2 mm | Y2L = 2.8 -> 10.3 mm | Y2L = 4.4 -> 16.2 mm | 3 mm away from center |