Reports until 12:37, Friday 20 December 2019
H1 AOS
robert.schofield@LIGO.ORG - posted 12:37, Friday 20 December 2019 (54011)
Bellows between ISCTEY and BSC10 -X door central viewport disconnected and covered; viewport cover on.

I have been using the BSC10 -X door central viewport to make movies of the flashing of scattered light from ETMY. Replacing the bellows requires large forces, so, after consulting with Ed and Jason, I have left the bellows disconnected from the viewport, but with the open end covered in aluminum foil, and I have placed a standard viewport cover over the viewport in the BSC door. The VEA is thus laser safe. The beam that travels through this bellows is from the TMS, but we have been leaving the beam diverter closed at all times, so there is no beam currently, and this shouldnt affect operations. I will put the bellows back on when we arent trying to keep locked and I can apply large forces (e.g. a Tuesday or earthquake).