In HAM2:
- by changing IM1 alignment, beam on IM2 moved about (0, -1.2mm), (pitch, yaw)
- by changing IM2 alignment, beam on IM3 moved about (-1.1mm, -1.8mm), (pitch, yaw)
- by changing IM3 alignment, beam on IM4 moved about (1.3mm, 0.3mm), (pitch, yaw)
None of these numbers themselves is large enough to be of concern.
In HAM3:
- by changing IM3 alignment, beam on PR2 moved about (20mm, 4mm), (pitch, yaw)
- by changing IM4 alignment, beam on PR2 moved about (0, 18mm), (pitch, yaw)
None of these numbers themselves is large enough to be of concern.
For refference:
The beam at PR2 baffle is about 1000 drive counts in diameter using IM4 yaw. This was measured by looking at the beam as it moved across the vertical frame of the PR2 scraper baffle.
Bottom Line:
IFO REFL was not found, which is a concern, so the IM alignment needs more work.
One concern is that driving the IM2/IM3 combo back to the wall spot may not be the right thing to do (my idea). Inside HAM2/HAM3, the sum total of all of the changes (level, rotation, input beam, etc.) since the spots were made, may make the wall spot invalid.