Elenna, Madi, Oli

Today we started tackling the alignment of all the REFL optics that go on the BHSS.

A Path
The A path went relatively smoothly. We had an issue with A-R1 where we had the left side alignment template D2400130 correct and placed A-R1 in it correctly, but the angle of A-R1 was off and sent the beam into the side of the OMCA butter dish. This was possibly due to an error with the clocking tool, but since Elenna had roughly placed the downstream optics last week, we were able to easily fix it by rotating A-R1's mount until it was shooting down the right way. We then were able to get the rest of the REFL A path worked out pretty well, just not the beamdumps.

B Path
The B path caused a few more issues. First, trying to place 36-R1 using the left side template, we realized that we couldn't actually use the tooling since 36-R1 has a J-holder for the black glass, and the screw that holds the J-holder in place doesn't screw in all the way - there are a couple of threads that stick out. Those couple of threads mean that the screw is in the way of the optic sitting in place in the template. To work around this, we ended up installing B-R1 using the right side template, and once we had that we used that as a reference to get 36-R1 reflecting OMCB REFL towards it. Later, we had some trouble getting the beam to B-R3 while also keeping B-R3 at the correct screwhole. We ended up moving it over one screwhole to the left, from L8 / T13 to L9 / T13. At this point we just roughly aligned it to go towards the QPD and left it for now since we might need to move it back over. We might end up needing to shift all the optics in that line over ?
UNFORTUNATELY, we also made a mistake. We aligned B-R2 to hit the B-2 QPD, and B-R3 to hit the B-1 QPD, but it's supposed to be the other way around. We will have to correct this next time!