Kiwamu Daniel

With ISS PD A mounted in the main path we measured the spectrum of the second loop ISS. The attached plot shows a clear improvement in the signal sent to the inner loop ISS. The red curve is a representation of the new control signal, whereas the dark red curve is representing the old configuration. The second loop out-of-loop sensor also sees improvements (black against gray) between 600 Hz and 4 kHz. The jitter out of the HPO is unchanged. The measurements were done at 54W into the IMC.