Agenda/Minutes of the VIS Meeting on 2019/11/29
2019/11/29 14:00 -
Participants: Takahashi, Aso, Lucia, Fabian, Okutomi, Sato, Ishizaki, Shoda, Tanaka
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.
For a temporary workaround, I put setpoint values of the GAS DC control to avoid the saturation. ---> The BF height has lifted more up: +50 um -> + 105 um.
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
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)