​​VIS upgrade toward O5
  • ​​30mHz IP for Type-A (Remote stopper): What is merit? Simulation is necessary.
  • ​​Remote adjuster of F1 damper for Type-A/B: Height adjustment at BF is more important.
  • ​​H4 geophone for Type-B.
  • ​​Accelerometer for Type-B: Manufacturing is ongoing in ATC.
  • ​​BF damper for Type-B: Design to avoid reinstallation of the tower.
  • ​​Wide range OSEM for Type-B/Bp: Priority is not high.
  • ​​Improvement of the Type-C suspension: 1-3Hz vibration made a jump in pitch. KFC suspension with size variation can be available.
  • ​​In-vacuum camera.
  • ​​Damping of Type-Bp suspension: Test after O4a.
  • ​​Active isolation table for IOO beyond O5.
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​​
​​Item
​​Suspension
​​Comment
​​Priolity
​​Status
  1. ​​30mHz IP
​​Type-A
​​What is merit? Simulation is necessary.
​​Mid
​​
  1. ​​Remote adjuster of F1 damper
​​Type-A, Type-B
​​Height adjustment at BF is more important.
​​Low
​​Height adjustment at F0 was not necessary in cooling.
  1. ​​H4 geophone
​​Type-B
​​No spare of the pre-amp board.
​​Low
​​
  1. ​​Accelerometer
​​Type-B
​​Manufacturing in the ATC.
​​Mid
​​On going.
  1. ​​BF damper
​​Type-B
​​Design to avoid reinstallation of the tower.
​​High
​​Asking the ATC.
  1. ​​Wide range OSEM
​​Type-B, Type-Bp
​​
​​Low
​​
  1. ​​Improvement of the suspension
​​Type-C
​​1-3Hz vibration made a jump in pitch.
​​High
​​Design for the KFC suspension is ongoing.
  1. ​​In-vacuum camera
​​General
​​
​​Low
​​
  1. ​​Optimization of the damping control
​​Type-B
​​Test after O4a.
​​High
​​On going.
  1. ​​Active isolation table
​​Type-C
​​Beyond O5.
​​
​​
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