Aidan. Greg.

The ITMX HWS probe beam is now aligned to the test mass. Or rather, it is misaligned just enough to prevent a return beam from the ETM getting back to the HWS.

The conjugate plane of the sensor is within approximately 5m of the ITM HR surface (details of this measurement to follow).

The Hartmann plate is installed on the sensor and it is now running the HWS code. The code is broadcasting EPICS channels but is throwing up a warning about not being able to write the centroid data to file (I'll need to fix this).

I've now set the ITMX RH to 6W for a 45 minute test to confirm that the sensor is actually measuring something from the ITM and not some other spurious signal.

I did turn the table HEPA filter back on just before this measurement, so the temperature is dropping significantly on the sensor (which looks like a small change in the thermal lens)