Contents
Agenda/Minutes
CRY+VIS Interface Meeting
Date : 13:00-14:00
Participants: Takahashi, Ikeda, Aso, Uchiyama, Ushiba, Kimura, Sato, Tomaru
Schedule
- IX: Final setting of height was applied on 4/26. Oplev for angle has been adjusted. To adjust length, it is necessary to damp the filter chain. One ACC was tuned on 4/24.
- IY: Remedy of the pre-isolator was postponed.
EX: Height adjustment is on going (Status). The measured height of ETMX (-19.5mm) is too low. It will be remeasured on 5/3.
- EY: Installation of the tower will be restarted on 5/11. Removing of the maraging rod is necessary.
Status
- Corrugate tube fixing jig: Replaced for IXV on 4/28.
- Commissioning in air: From mid. May for IX.
- Commissioning in vacuum:
- Acceptance check: Group work is set every Friday to make the acceptance check document.
- PF actuator: After SC.
- Jig for FC painting:
- Overall commissioning:
- Procedure of TM height setting: Plan for EX.
Box frame Box frame deformation.pdf
Discussion
VIS Meeting
14:00-14:30
Participants: Takahashi,Miyo,Terrence, Sugiyama, Fabian, Washimi, Sato, Aso
Schedule
See Schedule
- Type-A team: IXV 5/10, EYV 5/11-13
- Type-B team: PRM
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
- Final setting of the height was applied in IX.
- The height adjustment is on going in EX.
TypeB
Type-Bp
PR2
On Monday:
We measured the size of the buoyancy effect using stored data of the LVDT and a varnier calliper: 2.3 mm. It's too large to believe it. There must be something wrong in the measurement.
We moved the SF FR stepper motor physical stop screws up in order to increase the FR range: 5.54 mm. We also set new software limits.
We determined the height of the mirror to be -5 mm when having the
- BF at the setpoint and
- SF FR roughly at midrange.
- The temperature was 23.9 degrees.
- We installed the thermistor.
On Tuesday
- We set the SF keystone to nominal height, BF at the setpoint and the mirror was 6.5 mm below nominal height.
- The security structure is 3 mm below its nominal.
- The RM was 2.5 mm below nominal with respect to the security structure.
- We can only survey the +X side of the RM becuase the markings were made on the wrong side of the chamber, so checking roll was important.
- We also measured the position of the SF keystone when the LVDT readout was zero: 0.6 mm.
- Temperature decreased to 23.4 degrees.
On Wednesday
After checking roll, we corrected the height of the mirror to be 4.7 mm.
While keeping the BF at the setpoint we moved the SF FR up until the mirror was at the correct height.
- We measured transfer functions for the BF and SF to check whether the resonance frequency had changed: it didn't.
- The one for the BF was exactly the same as the reference.
- The one for the SF showed a smaller amplitude.
- The changed in amplitude is likely due to the SF LVDT being out of linear range. We will try to fix it by tuning the resistences in the LVDT card.
PRM
- Hirata-san and Tomaru-san made height markings for setting the mirror height.
- Hirata-san and Ikeda-san checked that the traverser is working properly.
TypeC
Electronics
Control
Safety
Discussion
Travel Plans
The week from 5/3
- Hirata: 5/6-9
The week from 5/10
- Takahashi: 5/10-14
- Sato: 5/10-14
- Hirata: 5/10-14
- Yano: 5/10-14
Next meeting
- 2021/5/14(FRI)