Agenda/Minutes of the VIS Meeting on 2019/6/21

2019/6/21 13:30 -

Zoom Meeting

Participants:

Progress report

Type-A (Takahashi)

Past week report

• Checked stock parts.
• Sent back a spare ACC unit to Mitaka for developments.

News

• ITMY
  • we decided to go with current configuration for the time being.
• ETMY
  • During a measurement, YF kicked IP accidentally and the orientation of ETMY went away.
    • Everything should be free now since BFYexc and MNexc transfer functions looked consistent with the ones measured before this kick.
    • Only the orientation was changed somehow.
    • We decided to open the chamber. The cryocooler was turned off already.
  • During another measurement. it was found that F3-GAS was arriver at the current position (klog#).
    • since the shapes of the GAS mechanical transfer functions were changed from the precious ones, I updated the modeled transfer function and filters in the filter-bank.

Building damping system for payload

• ITMX / ETMY
  • I started to measure the mechanical transfer functions with Photo-sensors for building.
    • ETMY-MN * 6dof, done. Sensor diagonalization would be necessary.

RT-model, MEDM, guardian updates

Plan for coming weeks

Type B (Mark)

Past week report

Plan for coming weeks

Type-Bp (Shoda)

Past week report

Plan for coming weeks

OMMT & OSTM (Takahashi)

Past week report

• Checked stock OSEMs. There are 17 units.
• Disassembled the pillars of the MC suspension for modification.
• Ordered the modification parts.

Plan for coming weeks

• Schedule(PDF/MPP)

VIS electronics (Tanaka)

Past week report

Plan for coming weeks

Other site works

Safety

• Incidents:
• Foreseen risks
  • Type-A:
  • Type-B:

Discussion

DAQ channel reduction

• List

Realtime model update policy

• Make local copies of the relevant files (.mdl, MEDM files etc) to modify an existing RTM.
  • Once the modifications are complete, you can deploy the modified files by replacing the existing ones.
• Notify the relevant people (kagra-seis and gokagra ML) in advance (more than a day) of the deployment of the modified RTM.
• Deployment should be complete.
  • Do not attempt a partial update, such as changing only ETMX. Update all the suspensions of the same kind (Type-A, B, Bp) at once, unless there is a good reason to do so.
  • Update MEDM screens at the same time to reflect changes in the RTM.
  • People can test the modified RTM during non-interferometer-commissioning time, i.e. in the morning.
    • After the test, the RTM should be reverted to the original one, before the interferometer commissioning starts.

Where to put the hardware WDS ?

• Type-Bp: GAS LVDT ?
• Type-B: IP ?
• Type-A: IP ?

POS table cover box

• BOX-with-panel.pdf

Travel Plans

• Travel (Week of 6/24):
  • Takahashi:
  • Sato:
  • Mark:
  • Hirata:
  • Shoda:
  • Fujii:
  • Tanioka:
  • Tanaka:
  • Terrence:
• Travel (Week of 7/1):
  • Takahashi:
  • Sato:
  • Mark:
  • Hirata:
  • Shoda:
  • Fujii:
  • Tanioka:
  • Tanaka:
  • Terrence:

Next meeting

On 2019/6/28(Fri)