Commissioning Strategy Meeting (2023/2/24)
- 3 months + 1 week to O4a start (24 May)
- Golden Week holidays(3-7 May)
- GWADW2023 (21-27 May)
- Daily commissioning strategy is necessary!
- More precise time sharing and assignments are necessary.
Can we work in KAGRA from am 5:00 ?? -> Consult with Ohashi-san
How much late is allowed in the night?? -> Consult with Ohashi-san
- Topics on the sensitivity enhancement
- Seismic noise isolation of OMC?? (~ 6 months??)
- where is the noise due to the "normally expected" seismic noise?
- Some selection
no opening vacuum tanks <- low seismic noise environment to realize 1-3Mpc
opening vacuum tanks <- if scattered light ? new injection path is also possible.
- TMPs were off on OMC/SRM at present.
- Seismic noise is still larger than O3GK now.
Can we reach the O3GK sensitivity level if we can realize the low seismic noise level? -> Washimi-kun -> We can reduce or not
- If we open OMC, what should we check?
- scattered light on the cable? that was identified by Akutsu-kun.
- Bleade spring resonance? No data.
- Up conversion noise implies scattered light noise?
OSTM swing to check the scattered lights? -> Ushiba
Slow actuation of suspension -> PEM team
- Hummering/acoustic test?
- stable noises also exist.
- 3 mirrors(IX, IY, EY) cooling(~2 months(assuming "1 month for one mirror" and "one cooling in one arm at the same time".)
- How much commissioning time will be used for
- suspension height adjustment
- drifting
- PY/L coupling adjustment
resonance mitigation control in -> minor adjustment is enough, mainly in gain.
- What is the milestone
- Cryocooler effects is serious or not? According to Yamada-kun's thesis, no effect for the designed sensitivity.
- We can check by just operating motors.
- We get peak noises nad enhanced noises for the frequency range of 10~100Hz.
- Seismic noise comparison?
- Can we cool during O?
- How much commissioning time will be used for
- Control of PRFPMI+DC
ADS/ASC/WFS for arms to mitigate the contrast fluctuation -> Ushiba
- mysterious off set problems
- under investigation.
- Check the TMSX to kill scattered light.
ETMY covering -> check effect
- ADS in FPMI
- Enhance OMC lock-acquire stability?
- more guardian improvement(Ushiba, Aso)
- More dynamic range of PNC-X?
- Laser
- HPL usage for IFO (120W to Toyama U, Characterized New 60W to KAGRA)
- After noise-hunting
HPL in Toyama U (new 60W characterization -> KAGRA, Repair of 120W from KAGRA)
Laser power increase strategy -> Arm cavity instability mainly of Pitch.
- Many measures were prepared. So this pitch can be suppressed. Not so serious.
- What is the milestone to change HPL
- 1Mpc ?
- noise budgeting?
- PLL adjustment is bothering us!!
- ISS
- below 3Mpc line. However, bad alignment will produce a line noise.
- HPL usage for IFO (120W to Toyama U, Characterized New 60W to KAGRA)
- Noise hunting, reduction, budgeting
- MICH
- noise budgeting is important.
- PRCL
- noise budgeting is important.
Suspension control around <100Hz for some suspensions
local control optimization(filter correction) to reduce the contrast fluctuation? -> Ushiba + alpha
- no problem in IMC controls
we need a summary!!(http://172.16.34.76/past_data_viewer/fig_nb/2023/0215/noise_budget_2023-02-15_12:05:26.png)
upload this link in JGWdoc/Dac wiki? -> Yuzurihara-kun
- Suspension control around the micro-seismic area
- try the bottom filter dumper sensor correction in L
- Terrence method trial in future
- PEM/DetChar activities
- Whitening filter apply
- REFL power up
- MICH
- MISC
Remove unnecessary stuff from the isolated area, especially around OMC. -> Miyoki
OMC: some cabling should be reset. -> Miyoki
Environment cleaning. -> Miyoki
- Seismic noise isolation of OMC?? (~ 6 months??)
- Topics on maintenance for the long operation
- Vacuum stuff
Ion pump operation estimation -> Who (Kimura, next week) -> Next week schedule.
-> do as soon as possible.
- TakahashiR-san maybe. + Takahashi-san, Yasui-san
- Cryo-coolers
- Air conditioning Coolers/heaters -. Miyoki
- Seasonal water drainage
- Yarm pumping mid March - mid May
- Vacuum stuff
