Aidan. Greg.

I fine-tuned the alignment of the ITMX HWS probe beam this afternoon. Actually, I'm now getting a return beam from ETMX, which I don't want, so I'm a little too close to a perfect retro-reflection. I'll detweak it tomorrow.

The camera has also been moved close to the conjugate plane of the ITM HR surface.

All of this was done with the LEXAN cover on the viewport. Further refinement will be necessary when this is removed. It should also clean up the return beam image.

The ITMX return beam is shown here. You can see the normal shadow from the baffles and the earthquake stops. There are no noticable stray beams coming from anywhere else.

I also misaligned ITMX to prevent the return beam getting back. Here's the return beam from ETMX. I know this is from ETMX because it swings back and forth when I put an injection into ETMX YAW.