Robert, Sheila
Robert and I went to ISCT1 before the beam diverters closed in this morning's lock acquisition. We saw that there was a beam from a POP path beam splitter that was dumped on a razor blade dump that was hitting the top of the dump, so that a small part of the beam was visible on the ALSX camera. We adjusted the beam dump to fully catch the beam. Once the beam divereters are closed this beam isn't there, so this shouldn't have been a noise issue in nominal low noise.
Robert has seen coherence between an accelerometer on this table and DARM in observing, we tried closing the ALS light pipe and Robert saw that didn't change the coherence, so he opened the light pipe again.