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Tue Aug 5 17:56:23 2008
SRM and PRM inspection
Yoichi, Koji, Rana, Steve, Alberto
Today we opened the
to inspect the optics, and in particular the
We found that one of the side magnets of the SRM was broken and a piece of it fell and got stuck to the LR magnet.
We removed the LR OSEM and took off the broken part with tweezers. Since we couldn’t replace the magnet on the side,
we decided to just switch the OSEM to the other side were a second magnet was available. Then we centered the OSEMs.
Using the optical levers we aligned both the ITMX and the SRM so that now we have to center again the OSEMs on both.
The PRM was visibly tilted and it was out of the range of the OSEMs. To try to fix the tilt we lift it up a little
with the screws on the bottom and pushed it with the third screw on top. That had the effect of making the mirror
tilt to the opposite direction. We looked at the wires (see attached picture) and it seemed centered on the side
of the mirror.
Tomorrow we are going to reset the OSEMs on ITMX and SRM and then we’re going to try to fix the tilt on PRM.
Uploaded Wed Aug 6 11:57:13 2008
Uploaded Wed Aug 6 11:57:32 2008