|
Size: 3099
Comment:
|
← Revision 18 as of 2019-08-16 15:51:08 ⇥
Size: 3964
Comment:
|
| Deletions are marked like this. | Additions are marked like this. |
| Line 2: | Line 2: |
2019/8/16 14:00 - |
2019/8/16 14:00 - 15:30 |
| Line 7: | Line 6: |
| Participants: | Participants: Takahashi, Fabian, Aso, Tanaka, Ishizaki, Lucia, Fujii, Miyo, Shoda |
| Line 20: | Line 19: |
| * For this purpose, we have to modify the model again. |
* For this purpose, we have to modify the model again. |
| Line 26: | Line 24: |
| * What is the summary for this week? | * What is the summary for this week? |
| Line 35: | Line 33: |
| * The difference between the above is like about 405um (it went to lower position), based on GAS_LVDTINF_OUT channel. | * The difference between the above is like about 405um (it went to lower position), based on GAS_LVDTINF_OUT channel. |
| Line 38: | Line 36: |
| * lopg: [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=9996|9996]] => status and plan? |
* lopg: [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=9996|9996]] => status and plan? |
| Line 45: | Line 42: |
| * utilize the TMY to BFY loop again, etc. | * utilize the TMY to BFY loop again, etc. |
| Line 47: | Line 44: |
| * make paths from TM to IPL, BFL to IPL. | * make paths from TM to IPL, BFL to IPL. |
| Line 51: | Line 48: |
| === Type B === ==== Report for the week 15-08-2019 ==== * Shoda-san improved the SR3 optic yaw motion (klog [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=9949|9949]]). * Improvement in the frequency band from 1 Hz to 2.3 Hz was achieved by modifying the IM-Y filter. The problem was not enough phase margin. * There's still a peak at 1.3 Hz. * She also modified the IM SENSALIGN matrix (diagonalization according to resonance peaks?) * Transfer functions should be measured again. * The BS optic has a large peak at 150 mHz (klog [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=9991|9991]]). |
|
| Line 52: | Line 57: |
| === Type B === ==== Past week report ==== ==== Plan for coming weeks ==== |
==== Plan for the week 19-08-2019 ==== * Enomoto-kun requested to extend the oplev control loop down to where the micro-seismic peak is. (Fabian.) * Assemsment of the motion of the SR optics around the micro-seimic region. (Due today.) |
| Line 59: | Line 64: |
| Line 63: | Line 67: |
| Line 64: | Line 69: |
| Line 68: | Line 72: |
| Line 70: | Line 73: |
| Line 79: | Line 81: |
| * Takahashi: * Sato: * Hirata: |
* Takahashi: 22-24(F2F) * Sato: * Hirata: |
| Line 83: | Line 85: |
| * Fujii: | * Fujii: 19-24 |
| Line 85: | Line 87: |
| * Fabian: 22-24(F2F) | |
| Line 87: | Line 90: |
| * Takahashi: * Sato: * Hirata: |
* Takahashi: * Sato: * Hirata: |
| Line 91: | Line 94: |
| * Fujii: * Tanaka: |
* Fujii: 26-30 * Tanaka: 26-30 |
| Line 95: | Line 98: |
| On 2019/8/29(Fri) | On 2019/8/30(Fri) |
Agenda/Minutes of the VIS Meeting on 2019/8/16
2019/8/16 14:00 - 15:30
Participants: Takahashi, Fabian, Aso, Tanaka, Ishizaki, Lucia, Fujii, Miyo, Shoda
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
Report for the week 15-08-2019
Shoda-san improved the SR3 optic yaw motion (klog 9949).
- Improvement in the frequency band from 1 Hz to 2.3 Hz was achieved by modifying the IM-Y filter. The problem was not enough phase margin.
- There's still a peak at 1.3 Hz.
- She also modified the IM SENSALIGN matrix (diagonalization according to resonance peaks?)
- Transfer functions should be measured again.
The BS optic has a large peak at 150 mHz (klog 9991).
Plan for the week 19-08-2019
- Enomoto-kun requested to extend the oplev control loop down to where the micro-seismic peak is. (Fabian.)
- Assemsment of the motion of the SR optics around the micro-seimic region. (Due today.)
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: 19-24
- Tanaka:
- Fabian: 22-24(F2F)
- Travel (Week of 8/26):
- Takahashi:
- Sato:
- Hirata:
- Shoda:
- Fujii: 26-30
- Tanaka: 26-30
Next meeting
On 2019/8/30(Fri)