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Size: 2100
Comment:
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Size: 3212
Comment:
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| Deletions are marked like this. | Additions are marked like this. |
| Line 65: | Line 65: |
== OMC Venting and Repumping Procedure with HPL preparation with PLL (2023/Jan/30~Feb/4) == *(Jan 30) * Before 9:00: FPMI realignment (Yokozawa-kun), Preparation for venting (Kimura-san, M.Takahashi-san) * Keep IMC lock using the present fiber laser. Stanby of R.Takahashi-san and Aso-kun for monitoring. * After informing the start of venting from Kimura-san to R. Takahashi-san, Kimura-san start venting. * If OMMTs realignment with pico is necessary, It will be done. * After finishing venting, Kimura-san informs to R.Takahashi-san, Aso-kun, Miyakawa-kun and Miyoki. * Miyoki changes the PSL from OBS to Wrok mode at this timing with IMC ASC? or around after all works are done on Jan 30? * IP2? HV drift monitoring. * Offload of IMC suspensions and IP1/2? * Just after the PSL mode change, Miyakawa-kun starts FB -> HPL changing. * After closing the GV between SRM/SR2, Kimura-san starts opening the bellows at GV. Start the repair work. We would like to avoid removing the all bellows duct to reduce the risk to produce another leak on the healthy opposite side. |
Output Mode-cleaner
Meetings
Installation work
Reports
Requirement
Shot noise increase due to the signal reduction by the OMC and residual spatial higher order modes after the OMC should be less than 5%.
Optical Design (updated 19/8/11)
item |
RoC |
Beam Raidus |
Misc |
OMMT1 |
13.16m |
4.46mm |
Dia: 99.95mm, thick: 55.58(largest), wedge: 2.45deg (measured by Hirose-san 2018) |
OMMT2 |
44.39m |
2.68mm |
Dia: 99.97mm, thick: 55.08(largest), wedge: 3.3deg (measured by Hirose-san 2018) |
OSTM |
flat |
TBA |
|
OMC1 |
flat |
444um |
|
OMC2 |
flat |
444um(X)/447um(Y) |
|
OMC3 |
1.80m |
604um |
|
OMC4 |
1.80m |
604um |
|
DCPD |
-- |
592um |
Space |
Distance |
AOI |
SRM-OMMT1 |
5.63m |
3.07deg |
OMMT1-OMMT2 |
2.60m |
3.07deg |
OMMT2-OSTM |
2.97m |
90deg |
OSTM-OBS1 |
0.30m |
90deg |
OBS1-OMC1 |
0.03m |
0.078deg |
OMC1-OMC2 |
0.357m |
3.00deg |
OMC2-OMC3 |
0.359m |
3.00deg |
OMC3-OMC4 |
0.357m |
3.00deg |
OMC4-OMC1 |
0.359m |
3.00deg |
Suspension Design
Total mass to be suspended |
13kg |
Number of suspensions |
3 |
Blade spring size |
220mm x 53mm |
Radius of curvature |
190mm |
Distance from a blade end to a suspension wire |
203.5mm |
Blade material |
MAS-1 |
Blade mass |
4.3kg |
Control Scheme
LSC |
|
Dither frequency |
1kHz (tentative) |
Dither optics |
OMC3 or OMC4 |
Signal extraction port |
OMC trans DCPDs |
ASC |
|
Dither frequency |
not yet decided |
Dither optics |
OSTM (tentative) |
Signal extraction port |
OMC trans DCPDs; on-board QPDs are used for the course alignment |
OMC Venting and Repumping Procedure with HPL preparation with PLL (2023/Jan/30~Feb/4)
- (Jan 30)
- Before 9:00: FPMI realignment (Yokozawa-kun), Preparation for venting (Kimura-san, M.Takahashi-san)
- Keep IMC lock using the present fiber laser. Stanby of R.Takahashi-san and Aso-kun for monitoring.
- After informing the start of venting from Kimura-san to R. Takahashi-san, Kimura-san start venting.
- If OMMTs realignment with pico is necessary, It will be done.
- After finishing venting, Kimura-san informs to R.Takahashi-san, Aso-kun, Miyakawa-kun and Miyoki.
- Miyoki changes the PSL from OBS to Wrok mode at this timing with IMC ASC? or around after all works are done on Jan 30?
- IP2? HV drift monitoring.
- Offload of IMC suspensions and IP1/2?
Just after the PSL mode change, Miyakawa-kun starts FB -> HPL changing.
- After closing the GV between SRM/SR2, Kimura-san starts opening the bellows at GV. Start the repair work. We would like to avoid removing the all bellows duct to reduce the risk to produce another leak on the healthy opposite side.