Agenda/Minutes of the VIS Meeting on 2020/1/17

2020/1/17 14:00 -

Zoom Meeting

Participants:

VIS Commissioning Task List

Post-O3 task list

Schedule afetr O3

Procurement list in 2019FY

Progress report

Type-A

Past week report

• Photo-sensor decoupling (klog#12528)

  • Decoupling: almost done
    • The original geometrical sensing matrix was completely useless.
  • Todos: Loop gain tuning
  • Nakano-san and Yamada-kun contributed a lot to it.

• 7.5 Hz double peak problem (klog#12473, klog#12516)

  • Only ETMY has double peaks around 7.5 Hz in TM pitch.
  • It's not critical to the PRFPMI commissioning so far, but looks annoying as reported by Nakano-san.
• GAS control status: No saturation at present

Plan for coming weeks

Type B

Past week report

• Okutomi-san and Yamamoto-kun modified the SRM payload sampling rate (from 4 kHz to 16 kHz) in order to make it compatible with the main interferometer control scheme.
• Tomura-san disabled all the SRM coil drivers hardware watchdogs.
• Fabian worked in the design of oplev cases. Akutsu-san provided useful information and more information is expected from the cryopayload group.

Plan for coming weeks

• Tomura-san will likely modify the other SR coild drivers.
• Fabian needs to finish surveying the SR2 cleanbooth in ordet to decide where the asembly frame will be.
• Fabian will continue with the oplev cover design.

Type-Bp

Past week report

• PR3 tripped again. V1 comes back a little bit, but it does not seem to be enough.

  • Better values for RT watchdog? (Maybe in the future, or other suspensions.) RMS values

Plan for coming weeks

OMMT & OSTM

Past week report

• Installed the OSTM suspension into the OMC chamber.

Plan for coming weeks

VIS electronics

Past week report

Plan for coming weeks

Other site works

Safety

• Incidents:

Discussion

LVDT sensitivity improvement using a 2nd readout channel. See these slides.

Travel Plans

• Travel (Week of 1/20):
  • Takahashi:
  • Sato: -19
  • Hirata:
  • Shoda:
  • Fujii:
  • Tanaka:
• Travel (Week of 1/27):
  • Takahashi:
  • Sato:
  • Hirata:
  • Shoda:
  • Fujii:
  • Tanaka:

Next meeting

On 2020/1/24(Fri)