Reports 1-1 of 1 Clear search Modify search
MIR (PR2)
naoatsu.hirata - 18:36 Monday 15 April 2024 (29228) Print this report
First contact PR2

[Hirata, Ikeda-san]

We apply First contact to PR2 mirror. We will pill off them tomorrow morning.

１．Lock Suspension（IM→RM→TM）

２．Cleaning（floor, inside chamber by vectra-α with ethanol and vacuum cleaner）

３．Surface inspection of HR and AR side by photo

４．Set FC jig

５．FC apply(AR→HR)

 

Before appling FC, we saw some edge and footprint of FC on HR and AR side. Those are 500mm or 600mm away from the center.
And also we saw some dots and small dust near the center. We will check it tomorrow morning after pill off FC.

Photo shooting was very difficult like PRM.(Especially AR side) 

I uploaded today's photo to KAGRA dropbox.

Comments to this report:
naoatsu.hirata - 22:05 Tuesday 16 April 2024 (29239) Print this report

[Hirata, Ikeda-san, Aso-san]

This morning, Ikeda-san and I pilled off PR2 First contact.

  • Waiting time: about 17h
  • AR side: We can see small edges at upper part, and thick edges at +Y side(550mm away from the center).
  • HR side: +Yside, FC edges were clearly seen. Small dot is near the center(20mm away from the center). It seems that this dot has always been in the same place. We also can see tag foot print, but it was seen before applying FC(600mm away from the center). There was clouded? area upper side of the center. After FC, this clouded area became less clearly visible.(Still we can see it little bit.)

In the afternoon, Aso-san tried to remove FC edges by applying FC partialy.

  • AR side: Thick edges were disapperead. We can see new small dots, but those are very small and far from the center.
  • HR side: +Y side FC edges were disappeared, but new small edge are appeared. But those are also far from the center.

I uploaded today's photo to KAGRA dropbox.

 

Search Help
×

Warning

×