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| * For inertial damping performance test > By Lucia | * For inertial damping performance test, LVDT damping vs. inertial damping > By Lucia |
Agenda/Minutes of the VIS Meeting on 2019/8/16
2019/8/16 14:00 -
Participants:
Progress report
Type-A
Past week report
* For the 150mHz-ish mode damping
- sensor correction for IP, i.e., seismic signal subtraction system, was implemented to all the type-A suspensions.
- BF-L/T damping was also implemented for this damping.
The RMS was suppressed by a factor of like 2.7, log 9961
- (SC at IP) + (BF-L/T) made the system quieter compared to the previous, however, it was not enough
- IP-TF does not have the peak at 150mHz-ish.
- BF-actuation efficiency is not so high.
=> we will try to the feedback like BFl to IPL, or TML to IPL, for the next.
- For this purpose, we have to modify the model again.
* For inertial damping performance test, LVDT damping vs. inertial damping > By Lucia
* length-oplev calibration with green lock
log: 9989
- 1st trial. The values are *NOT* installed since we could not guarantee if we were observing TML motion not TMY motion. It looks they are not terrible values, compared to ground motion though.
* F3-GAS of EY: looks stacked again
log at 2019 Aug. 15th, when it was stacked: 9990
log at 2019 Aug. 15th, when it was free: 9293
- The difference between the above is like about 405um (it went to lower position.), based on GAS_LVDTINF_OUT channel.
* ETMY health check
lopg: 9996
=> status and plan?
Plan for coming weeks
* Guardian stuff
- utilize the TMY to BFY loop again, etc.
* RTmodel modification
- make paths from TM to IPL, BFL to IPL.
* 150mHz-ish suppression
- implement loops like TM to IP.
Type B
Past week report
Plan for coming weeks
Type-Bp
Past week report
Plan for coming weeks
OMMT & OSTM
Past week report
Plan for coming weeks
VIS electronics
Past week report
Plan for coming weeks
Other site works
Safety
- Incidents:
Discussion
- For the people in Kamioka, checking the presence/absence at the site will help us (not only for Mitaka persons).
Travel Plans
- Travel (Week of 8/19):
- Takahashi:
- Sato:
- Hirata:
- Shoda:
- Fujii:
- Tanaka:
- Travel (Week of 8/26):
- Takahashi:
- Sato:
- Hirata:
- Shoda:
- Fujii:
- Tanaka:
Next meeting
On 2019/8/29(Fri)