New annulus on the WI bench

Today as asked by J. Marque, I proceeded to increase the size of the inner diameter of the annulus by moving L3 on the bench. The first image shows the annulus as it was before the L3 movement. The bright spot in the centre is clearly visible. Moreover, the annulus seems a little bit more intense on the right.



The second image is the same as before, but I turned on also the Central Heating beam.



I then moved L3 by several cms, but before I signed the old position of the lens. The next image shows the new annulus. The bright spot seems less intense than before and the annulus seems more uniform.



As before, I then turned on the CH. I had to realign it to be in the centre of the annulus.

Since I moved the central spot, from the Control Room, I moved the motors of Mirror B to re-center the central spot on the WI TM. It was pretty easy by looking at the PC1 images.
The old positions were:
UL:6200
BR:300
The new positions are:
UL:5800
BR:1100

I think that the new dimension are: Outer Diameter 16 cm, Inner Diameter 12 cm ...the same of NI bench