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| Deletions are marked like this. | Additions are marked like this. |
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| * 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 [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=9961|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 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 [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=9961|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. |
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| * For inertial damping performance test, LVDT damping vs. inertial damping > By Lucia * ETMY: [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=9981|9981]] * ITMX: [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=9995|9995]] * What is the summary for this week? |
* For inertial damping performance test, LVDT damping vs. inertial damping > By Lucia * ETMY: [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=9981|9981]] * ITMX: [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=9995|9995]] * What is the summary for this week? |
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| * length-oplev calibration with green lock * log: [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=9989|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. |
* length-oplev calibration with green lock * log: [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=9989|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. |
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| * F3-GAS of EY: looks stacked again * log at 2019 Aug. 15th, when it was stuck: [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=9990|9990]] * log at 2019 Aug. 15th, when it was free: [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=9293|9293]] * The difference between the above is like about 405um (it went to lower position), based on GAS_LVDTINF_OUT channel. |
* F3-GAS of EY: looks stacked again * log at 2019 Aug. 15th, when it was stuck: [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=9990|9990]] * log at 2019 Aug. 15th, when it was free: [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=9293|9293]] * The difference between the above is like about 405um (it went to lower position), based on GAS_LVDTINF_OUT channel. |
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| * ETMY health check * lopg: [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=9996|9996]] |
* ETMY health check * lopg: [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=9996|9996]] |
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| * Listed up the modification parts in the 3D CAD model. | * Listed up the modification parts in the 3D CAD model. |
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| * 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. |
* 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. |
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:
- Sato:
- Hirata:
- Shoda:
- Fujii:
- Tanaka:
- Travel (Week of 8/26):
- Takahashi:
- Sato:
- Hirata:
- Shoda:
- Fujii:
- Tanaka:
Next meeting
On 2019/8/29(Fri)