With Enzo, Hirata-san, Kozu-kun and Terrence.

Today:

• Terrence revisited the LVDT calibration from yesterday to extend the range and find the edges of the non-linear region. See attached plot.
• Enzo reinstalled the original sat amps, this time with the 100 nF capacitors for reduced noise. #0 (TM) = S1807619, #1 (IM-V) = S1807620, #2 (IM-H) = S1807623.
• We tested the horizontal FRs of the IP and they all worked to move the spring carriages, although the IP was not yet unlocked.
• We tested the F0 FR and it also worked well. Positive step values give upwards adjustment.
• We installed the arc weights, in two groups of three on the ±T sides.
• We installed the geophones but did not cable them yet.
• We unlocked the IP and adjusted the jacks to improve the centering. The IP seemed stable and very soft.
• We locked the IP and F0 keystone for safety over the long weekend.