-Flexures installed SN 21, SN 22, they have survived throughout the day (I haven't unlocked the CRS since moving to the table, but visually they look fine)
- I re-balanced the CRS so there is now a new distribution of masses on the proof mass
-The CRS is semi-bolted on the table, we haven't put any dog clamps down, but there is one place where the CRS can be bolted directly into the table
-Temperaraly put baffles on, on baffle SN 001 had to remove one of the bolts to fit it around a pre-existing optic on the table
-Fil, Mitchell and I got the out of vacuum fiber all cabled up, however, later in the day when we tested the laser power at each point of the chain, it looked like light wasn't making it through the fiber. We have been using this fiber for testing chamberside so if it's an issue with the fiber it started today.
-We turned on the laser briefly to look at the power at each point along the chain:
OUT OF LASER: 20.5mW
OUT OF VAC FIBER: 7um
Which means there's either a issue with the 27m out of vac fiber, or the connector between the laser and the fiber
The plan for Monday is to first switch out the connector and hope that was the issue. If that doesn't fix it, I'll look for another temperary fiber to use to at least get the HoQIs aligned and deal with the broken fiber later.
We did use the long 27m patch fiber for chamberside testing, and it worked well.
There is an other 5m PM fiber on the cart nearby you can use to verify if it's a problem with the connector or the fiber itself.
I would also inspect the fiber ferrules of the long fiber with a fiber microscope to check for damages.
Very good news:
The issue was the connector, it looks like the issue was from the fibers not sitting flush with eachother, most likely due to where we were placing the connector (in between some holes in the rack, but once removed and re-connected power traveled through the fiber perfectly (tested with the 5m fiber and got the same results). In the the power reading for the out of vac fiber is:
OUT OF VAC FIBER: 18.86mW
I've turned off the laser to let the crew working in HAM3 right now do so without glasses and once they are done I'll go back into HAM3 and test the rest of the chain and start aligning the HoQIs
We finished getting all the cables and fibers connected and tested. Both HoQIs give data and are connected to the right channels (left HoQI=HoQI1, right HoQI=HoQI2).
The in vacuum fiber splitter is very difficult to work with, when trying to get it to spool or lay neatly on the table it would constantly stick to every other table component just due to static, and is insanely difficult to keep organized and out of the way so in the future having something dedicated to spool the fiber around is necessary
The power at each end of the spilter is:
HoQI 1 (Left): 5.2mW
HoQI 2 (Right): 4.7mW
The HoQI themselves are still roughly aligned, with HoQI 1 averaging a fringe visibility of ~71% and HoQI 2 ~82%, I didn't finish aligning them this evening, but I'll do it first thing tomorrow morning before doing the final balancing and doing transfer functions tomorrow night.
The CRS laser is OFF