Simon

I have successfully reset the absorption bench by removing all the additional optics which we put for the polarization measurements.
After that I adjusted the optical-unit (putting it back to calibration position @70mm) and exchanged the ETMY test-mass with the calibration-sample holder. I used partly the empty space on the optical-unit table to lift the heavy test-mass.

During calibration, I recognized that the bulk-sample is still inside the holder. However, by that time, I already finished to take some calibration measurements. So, I changed it with the surface-sample and took the respective measurement. Anyway, in both cases the calibration looks very good.
The crosspoint, however, seems to be shifted by 2mm compared to our calibration for ETMX, but is in very good agreement to measurements taken in February this year. I did not do a further analysis of the calibration measurements yet (maybe I do this during weekend, let's see). But just by the eye, the AC/DC values look good.

During the weekend, I shut-down the laser-power as there is nothing to do. For the actual test-mass, I need to be there for carefully increasing the laser-power, which will take some time, I guess.