[Namai-san, Ueda-san from KEK, Sato-san, and Tomaru-san]
We worked on the cryostat in ATC to install adapters for windows on 80K shield.
What we did is as follows:
Since we don't have indium sheet, we used grease to contact with cold head.
Though this grease can be used in vacuum (~10^-7 Pa), if the contamination on mirrors become a problem, we will remove the grease and use indium sheet.
The remaining tasks are:
Today I temporary installed the adapter flange and 4K shiled inside the cryostat chamber to confirm the screw hole position is correct.
The adapter flange and shield seemed to be O.K., but I need 10 more ultrasonic cleaned M6 screws.
In addition to that, we need super insulator on 4K shield and tape to fix cables.
The procudure for remaining tasks are:
This entry is log on 28th Oct.
I cut some teflon sheet for cushioning between glass window and adapter.