After TJ and I replaced the fiber collimator for the ETMX HWS signal last week, we can see some believable ETMX HWS signals. Ther is still something strange happening as we power up (maybe retroflections off ITM before we move spots), but once we reach 60W we can see the test mass change curvature as expected. See attached ETMX signals at 3 minutes, 5 minutes, 20 minutes and trends. We don't expect this HWS signal to be accurate as have done no calculating of the mode matching after we removed a lens in 81734 but we took the data to do so.

There's a dead pixel we should remove but the code has an error "Plotting error: Object Array cannot be loaded when allow_pickle= False" that's not letting me see the Original image.