with Hirata-san, Fabian-san

We removed the jig at first and then peeled off this FC by pulling the left tab with blowing the Top gun.

Unfortunately, there is FC residue and one spot of dirt on its left side.

We could find these two pieces of dirt by visual inspection, but we found some more dirt by camera shot.

Please check the attached picture and discuss the next step.

This morning, we inspected the surface of the mirror with Tomaru-san using Flashlight, Blacklight, and Greenlight.

The Greenlight helped us a lot to find some particles on its surface.

And he suggested that the FC residue and some small stains won't affect much because these are not close to its center.

On the other hand, we realized that the AR side has some stains, which were never found before, on its upper right area and lower right area.

You can see that in our pictures (https://www.dropbox.com/work/Subsystems/MIR/mirror%20inspection/SR2/20220325).

After some discussion, we started to apply the First Contact on the AR side, and no need for HR.

The method is the same as yesterday, and I carefully put two peeling tabs so that these tabs could reach the edge of the FC.

We took some pictures and uploaded on here.

And we will peel off this FC on Monday morning and inspect it again.

with Hirata-san, Tomaru-san

We removed the jig for AR and peeled off this FC by blowing the Top gun.

Unfortunately, FC residue remains on its right side, which we pulled the peeling tab, and some stains we want to remove also remain.

Some pictures of the surface of this mirror were stored here.

Then we realized that this type of stain couldn't be clean by the First Contact.

Furthermore, the mirror has still some small dust and we couldn't remove them by blowing the top gun.

But this dust could have stuck to its surface after the FC was removed because we were working upwind.

Anyway, we decided we couldn't do any more cleaning and we released the suspension.