| The document recording ETM07 and ETM08 coating (T2300093) was discussed:
the current plume files are not necessarily correct in a way that LIGO lab have tried to add it on uncoated ETM such as ETM07 and it does not match what the coated ETM07 would look like.
the plume should be added on top of the uncoated ETM instead of assuming an ideal ETM. According to Garilynn, the imperfection on uncoated ETM matters.
So far the possible ETM data used for O5, ETM 11,14,19, and 20 are all uncoated, and different ways could be used to predict the plume, including the plume data on LIGO dcc or subtract the uncoated data from the coated for O4 ETM and use that as another guessed plume. |