Contents
Agenda/Minutes
CRY+VIS Interface Meeting
Date: 2021/5/14 13:00-13:55
Participants: Takahashi, Miyo, Node, Aso, Ushiba, Sato, Tomaru, Hirata, Ikeda, Kimura
Schedule
- IX: IP was released on 5/10. Adjustment of Yaw FR is scheduled on 5/17.
- IY: Remedy of the pre-isolator is postponed.
EX: Height adjustment was finished (Status).
- EY: Installation of the tower was restarted on 5/11. The maraging rod was removed. Items (pure water maker, etc.) for the mirror cleaning are under preparation.
Status
- Corrugate tube fixing jig: Other 3 sets will be ready by the end of June.
- TM height setting: Final setting of height in EX was on 5/13. Angle adjustment in EX was scheduled on 5/13.
- Commissioning in air: Started on the pre-isolator in IX.
- Commissioning in vacuum:
- Overall commissioning: Operators are necessary.
- Acceptance check: Group work is set every Friday to make the acceptance check document.
- PF actuator: After SC.
- Jig for FC painting: Test is scheduled in the week of 5/17. Minimum target is to learn the procedure with the jig.
Discussion
VIS Meeting
14:00-14:40
Participants: Takahashi, Hirata, Miyo, Sato, Sugiyama, Fabian, Ishizaki, Tanaka, Aso
Schedule
See Schedule
- Type-A team: IXV 5/17, EYV 5/18-21
- Type-B team: FC painting test 5/17-19, MSB?
Milestone
IMC suspensions are ready in air [40] will finish 2011/04/21.
PRs are ready in air [643] will finish 2011/07/09.
ETMX is ready in air [656] will finish 2021/08/25.
ITMX is ready in air [657] will finish 2021/08/31.
ETMY is ready in air [658] will finish 2021/09/16.
ITMY is ready in air [659] will finish 2021/11/08.
BS is ready in air [691] will finish 2011/11/24.
SRs are ready in air [663] will finish 2011/12/20.
Output suspensions are ready in air [695] will finish 2011/12/21.
TMSY is ready in air [708] will finish 2011/??/??.
TMSX is ready in air [684] will finish 2011/??/??.
2021/03/29 updated
Klog
EX
16535 Height adjustment of ETMX , ryutaro.takahashi
General
16506 Deleted unnecessary processes from VIS model file. , satoru.ikeda
IX
16421 Height adjustment of ITMX , ryutaro.takahashi
MCE
16512 MCe oplev characterization , takaaki.yokozawa
MCF
16498 Type-C simulation model , yoichi.aso
16501 Oplev calibration MCo , takaaki.yokozawa
16500 Characterization of optical lever MCi , takaaki.yokozawa
- 16537 MCo suspension strange , tomotada.akutsu
16157 Investigation of IMC suspensions , ryutaro.takahashi
16513 Comment , kouseki.miyo
PR3
16520 Thermistor installation , fabian.arellano
16521 Setting the mirror to nominal height , fabian.arellano
16348 Tightening the locating clamps for the piano wire. , fabian.arellano
16502 Comment , fabian.arellano
16520 Thermistor installation , fabian.arellano
- 16533 Comment , fabian.arellano
16521 Setting the mirror to nominal height , fabian.arellano
PRM
SR2
16509 Lowering the pre-isolator , fabian.arellano
This is generated by python script in /users/Miyo/dropbox/Script/scrapping/main.py.
Summary Report
TypeA
TypeB
Type-Bp
PR2
As people may remember we had to move the SD keystone very high in order to have the mirror at the appropriate height:
- At such position the TF had a smaller amplitude. See klog.
- At the LVDT card we checked the return signal from the LVDT and it was clipping due to saturation. See example in klog.
- We reduced the gain until we achieved a suitble sinusoidal signal and adjusted the phase to -180 degrees (not zero due to the height of the keystone).
- Then we calibrated the OSEMs.
- The responsivity is not as good as in other LVDTs becuase we require a large measuring range. The suitable position of the keystone is 5.3 mm above the zero of the LVDT, so it likely has a range of about 10 mm.
- The transfer function shows a healthy system.
- I still have to take note of the resistance values of the SF LVDT card channel.
PR3
- We adjusted the pitch of the mirror
- First we measured IM TFs and saw that the IN wasn't touching the IRM.
- Then we measured the mirror pitch to be -1.4 mrad, not far away from the target of -3.3 mrad.
- The back side is not accesible for the laser level so se used the front side.
- ROC: 458 m
- We set the laser level at the vertical midpoint of the mirror in order to minimize the systematic error introduced by the curvature.
- Using the picomotor we moved the pitch to the target value of -3.3 mrad
- Then we adjusted the positions of H2, H3 and V1 OSEMs.
Yet to do in PRM
- We need to measure IM TFs
- We realized we might have mistake in setting the height. We need to double check.
- We need to double check that the H3 OSEM screws are tightened enough.
- We require one more day.
TypeC
Electronics
Control
Safety
Discussion
Travel Plans
The week from 5/17
- Takahashi: 5/17-21
- Sato: 5/17-21
- Hirata: 5/17-21
- Yano: 5/17-21
- Aso: 5/17-20
The week from 5/24
- Takahashi: 5/24-28
- Sato: 5/24-28
- Hirata: 5/24-28
- Yano: 5/24-28
Next meeting
- 2021/5/21(FRI)