A. Effler, R. Schofield, R. Short

This morning, we started working in BSC1 to prep for the new cage baffle installation on ITMY. Before going into any chambers, Anamaria and Robert moved ITMY to center the OpLev signals. Once at BSC1, Anamaria and I were in the chamber while Robert handled tools in and out as well as kept an eye on particle counts. We started by attaching the long locker bracket on the arm cavity baffle (ACB), then pushed the ACB up and away from the quad after undoing the hinge assembly. While holding the ACB up, we inserted and screwed in the wedge that keeps the ACB away from the quad. With this out of the way, we locked down the bottom two stages of both the main and reaction chains of ITMY by pushing in the earthquake stops until they just came into contact. We then went about replacing the stops on the HR surface of the ITM. After this, we realized that we meant to get measurements of the test mass and reaction mass before they were locked down, so we unlocked the bottom stages of each chain so they were free hanging and took measurements, then re-locked the stages. At this point, we stopped for lunch.