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| * Better values for RT watchdog? (Maybe in the future, or other suspensions.) [[https://www.dropbox.com/sh/1b8a0z4pn3d6b3g/AACopJmyfV0I2t44Ak9GIn4Ja?dl=0|RMS values]] | * Better values for RT watchdog? (Maybe in the future, or other suspensions.) [[https://www.dropbox.com/sh/1b8a0z4pn3d6b3g/AACopJmyfV0I2t44Ak9GIn4Ja?dl=0|RMS values]] |
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| LVDT sensitivity improvement by using a 2nd readout channel. See [[https://www.dropbox.com/s/jywcdyxwrq084b3/LVDT_possible_modification.pdf?dl=0|these slides]]. | LVDT sensitivity improvement using a 2nd readout channel. See [[https://www.dropbox.com/s/jywcdyxwrq084b3/LVDT_possible_modification.pdf?dl=0|these slides]]. |
Agenda/Minutes of the VIS Meeting on 2020/1/17
2020/1/17 14:00 -
Participants:
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.
- Decoupling: almost done
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: -21
- Hirata:
- Shoda:
- Fujii:
- Tanaka:
- Travel (Week of 1/27):
- Takahashi:
- Sato:
- Hirata:
- Shoda:
- Fujii:
- Tanaka:
Next meeting
On 2020/1/24(Fri)