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Size: 695
Comment:
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Size: 913
Comment:
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| Deletions are marked like this. | Additions are marked like this. |
| Line 8: | Line 8: |
| * Suppress angular modes by XX * Suppress laser noise at the 11 & 55 MHz readout frequencies by XX |
* Suppress angular modes by XX (note that the IMC also filters the beam jitter) * Suppress laser noise at the 11 & 55 MHz readout frequencies by XX (this is primarily a PMC function as the IMC transmits the sidebands) |
| Line 13: | Line 13: |
| * what's the MM frac between PMC and IMC? | * what's the MM frac between PMC and IMC? Judging by the [[ https://nodus.ligo.caltech.edu:8081/40m/12898 | IMC visibility]], this is ~98%. |
Power calculation
P_arm = Plaser * T_PMC * T_IMC * T_FI * alpha_MM * G_PR * T_BS * G_arm
(Gautam put some numbers here for the terms please)
- What should our PMC Finesse be so that its barely enough to satisfy filtering reqs and transmission efficiency?
- Suppress angular modes by XX (note that the IMC also filters the beam jitter)
Suppress laser noise at the 11 & 55 MHz readout frequencies by XX (this is primarily a PMC function as the IMC transmits the sidebands)
Maintain a T_PMC > 0.9X
- What's up with our T_IMC ?
- let's clean the IMC mirrors
what's the MM frac between PMC and IMC? Judging by the IMC visibility, this is ~98%.
- Is our T_FI too low?
- measure this during the vent when we clean the IMC
- What is the loss in the PRC?
- clipping in the PRC
- new PR/SR mirrors