Reports until 18:31, Wednesday 01 July 2026
H1 SEI (SEI)
shoshana.apple@LIGO.ORG - posted 18:31, Wednesday 01 July 2026 (90851)
CRS Installed on HAM3

[Jim, Shoshana]

Yesterday when I went to put the cover on the CRS to get it ready to move to the clean area right next to HAM3, I noticed one of the flexures (SN 15) was broken [picture attached]. It's unclear how this flexure broke as it had been locked since last Wednesday (?), and it is strange that only one flexure broke.

We decided that it would be better to install a new pair of flexures and re-suspend next to the chamber rather than in the temporary clean room to reduce the risk of them breaking again. So today we wheeled the table the CRS is on to the space next to HAM3 and I re-suspended the CRS there and roughly balanced it.

Following the procedure outlined in E2600210 and work permit 13356,  we moved the CRS to the table and lined everything up so that the CRS baseplate can be bolted directly to the table in one spot.

We installed the fiber feedthrough, and dealt with all the cabling (fiber and DB25) that required Jim to be physically inside the chamber and we'll install the rest of the cable clamps which we can reach from outside the chamber tomorrow and finish connecting all the cables and dog clamping the CRS down (hopefully)