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VIS (IX)
ryutaro.takahashi - 20:01 Tuesday 09 March 2021 (16199) Print this report
Setup of IP

[Takahashi, Sato, Horiuchi]

We started the setup of IP.

  1. Connected the in-vacuum cables from the geophone pods to the feedthrough #7. The port of 5-7 were used.
  2. Connected the D-sub cables from the feedthrough to the geophone distributer which was taken from the EX.
  3. Checked the signals of geophones. The geophones were not working.
  4. Checked cable connection and pin signments. We found the direction of pre-amp attached onto the feedthrough was wrong.
Comments to this report:
ryutaro.takahashi - 21:01 Thursday 11 March 2021 (16238) Print this report

[Takahashi, Sato, Horiuchi]

  1. Revised the direction of geophone pre-amps.
  2. Confirmed signals of the geophones on the DGS.
  3. Adjusted the ballast rings on the IP. The geophone pods (35.4kg), TF ballast (52.7kg) and big block (1.8kg) were added. Three t=38 ballast rings (51.6kg), three t=19 ballast rings (25.8kg) and the ACCs (8.9kg) were removed. Total start weight was +3.6kg from setting in O3.
  4. Tuned the IP. The resonant frequency reached less than 60mHz.
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