KAGRA Logbook

[Takahashi, Ishizaki, Sato, Shindo, Okutomi]

The dummy payload (DP) is assembled and put on an end plate of the EQ-stop
- NOTE:
  - Cap screws on the end plate which support the DP from the bottom don't have enough length
  - We now use them in upside down to gain the height
  - We need to order longer full-threaded screws later
Release sensors are set on the end plate, too.
- We cannot obtain the signal from the release sensors now
  - Because the indication circuit box is in Mitaka
  - The box will be sent in this few days
  - We need to connect cables from the release sensors to the box after the delivery
An end plate of the EQ-stop for the Bottom Filter is assembled
- Now the EQ-stop building has two floors (DP, BF)
Next: BF assembling

The attachment ring is assembled, ready to set on the BF
- This ring has primary coil assemblies
- NOTE:
  - The company mismachined a digging mark which shows upper surface of the ring to be on lower surface
  - I and Sato-san decided to use the ring in upside down
    - Because all the other machinings are correct and to avoid further confusion
  - The position where the mark should be is now marked with a kapton tape
- The ring has now only vertical primary coils as written in the installation procedure
  - Horizontal primary coils will be attached after the BF reached at the height of the cross chamber
  - Installation procedure >>> https://www.dropbox.com/home/Subsystems/VIS/TypeA/Review (Dropbox account required)
- The coils are not cabled yet
  - We are waiting a delivery of some missing stuff
Secondary coils are left without assembling
- They will be attached at the same moment as the horizontal primary coils
- After the discussion about cabling, I will assemble them partially