Agenda/Minutes of the VIS Meeting on 2019/11/29

2019/11/29 14:00 -

Zoom Meeting

Participants:

VIS Commissioning Task List

Post-O3 task list Procurement list in 2019FY

Progress report

Type-A

Past week report

• Sato-san started the design of limit switch for FR.

• ETMX GAS control saturation problem (klog#11831)

  • F0 and F1 GAS control got saturated.
  • The height of BF has changed by +50 um in this 1 week.

  • Control output offloading is needed with fishing rods. ---> To be arranged in a few days

Plan for coming weeks

Type B

Past week report

• I modified the real-time model in order to accomodate bandpass fillters and new DAQ channels. See 11788.

  • For the most part I used the same scheme as Type A.
  • As agreed in the previous meeting I added a matrix ramp switch in order to transit from velocity damping to bandpass filters.
  • The medm screen was modified accordingly.
  • I realized yesterday I hadn't added a monitor for the output of the new filters banks in the EUL basis. It's been added to the real-time model, it compiles but still has to be installed.
  • Real-time models for SR suspensionsmust be compiled and installed.

• Together with Terrence I modified vistools in order to generate functions to manipulate added filter banks. See 11788.

  • The future of vistools looks quite gray (the code is complicated, not commented and we don't know how to manipulate matrix switches). Some additions will likely be in regular Guardian.
  • I began adding code for the OBSERVATION state in a draft file.
• There was an agreement with Okutomi-san to change Type B medm screens for something more illustrative of the signal paths.
• The temperature in the BS area has increased. It's been lately between 23.7 and 23.8 degrees. The actuation on the top filter used to be -23,000 counts and is now -13,500 counts.

• Yamada-kun and Yokozawa-san measured transfer functions from BS to DARM and calculated the noise contribution. See 11676, 11724, 11707.

  • The results are affected by an error in the calibration and are yet to be corrected.

  • The contributions of TM_DAMP_L and TM_DAMP_Y were considered to be high. These filters are supposed to be off in OBSERVATION state. See this plot.

  • These filters were rolled-off and the a new estimation was calculated. See this other plot.

  • The roll-off of TM_DAMP_Y was conservative.

• Ushiba-san turned off BS TM-L DAMP filter for the FPMI state (11783). It may have been affecting the sensitivity.

• For the purposes of ASC the diagonalization of the TM actuation with respect to the oplev was removed by commissioners and replaced by their own coil balancing and drivealign diagonalization. I couldn't find a klog for this
• Hirata-san disassembled the mirror hanging jig and transported it to Mitaka.

Plan for coming weeks

• Compile and install SR real-time models.
• People have begun to modify or turn off filters which are supposed to be off in OBSEVATION state, maybe I should aim to design the bandpass filters and then implement the Guardian OBSERVATION state.

Type-Bp

Past week report

Plan for coming weeks

OMMT & OSTM

Past week report

• Transported the OSTM mirror.

Plan for coming weeks

• Installation of the OSTM suspension (12/9-12).

VIS electronics

Past week report

Plan for coming weeks

Other site works

Safety

• Incidents:

Discussion

• Schedule afetr O3

Travel Plans

• Travel (Week of 12/2):
  • Takahashi:
  • Sato: 3-4(ICRR Kashiwa)
  • Hirata:
  • Shoda:
  • Fujii:
  • Tanaka:
• Travel (Week of 12/9):
  • Takahashi: 9-12
  • Sato: 9-12
  • Hirata:
  • Shoda:
  • Fujii:
  • Tanaka:

Next meeting

On 2019/12/6(Fri)