KAGRA Logbook

Reports 1-1 of 1

LAS (General)

osamu.miyakawa - 18:06 Wednesday 28 April 2021 (16616)

ISS PDs removed

ISS PDs on the table at the transmitted port of IMMT1 have been removed. All other QPDs and DC PDs are left as they are.

On the same time, the heavy box surrounding optics on the table was removed.

I noticed that the pylon below the table is fixed by two clamps, and the pilon is strong to the motion to the parallel direction to the two clamps, but the pilon is apparently weak for the orthogonal direction to clamps. It can be moved by pushing by hands. I told this behavior to Akutsu-kun.

Comments to this report:

tomotada.akutsu - 20:45 Wednesday 28 April 2021 (16618)

yes, thanks for the information. I believe the pylon was rigidly fixed also in such direction in the first days (5-6 yrs ago)... althogh only using two clamps. The usual procedure to set the pylon included kicking-like brute attack to the pylon to check its stability as I deeply understood the importance of this pillar... did someone relocate the pylon other than me?? annyway, I'll check it.