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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 to the MEDM 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
- ETMY health check
lopg: 9996 => status and plan?
- Listed up the modification parts in the 3D CAD model.
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 (Takahashi)
Past week report
- Ordered the dummy mirror to be used for gluing test.
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: 22-24(F2F)
- Sato:
- Hirata:
- Shoda:
- Fujii:
- Tanaka:
- Travel (Week of 8/26):
- Takahashi:
- Sato:
- Hirata:
- Shoda:
- Fujii:
- Tanaka:
Next meeting
On 2019/8/29(Fri)