In the context of tuning the IP resonant frequencies before O4, I measured the resonant frequencies of SR3 and SRM. The values for BS and SR2 will be reported next week.
| IP-L (mHz) | IP-T (mHz) | IP-Y (mHz) | |
| BS | |||
| SR2 | |||
| SR3 | 90 | 70 | 328 |
| SRM | 58 | 55 | 313 |
Files:
/kagra/Dropbox/Subsystems/VIS/TypeBData/XXX/TF/Measurements/20200910/
where XXX = SRM, SR3.
I updated the table:
| IP-L (mHz) | IP-T (mHz) | IP-Y (mHz) | Temperature (ºC) | |
| BS | 85 | 117 | 164 | 24 |
| SR2 | 70 | 87 | 316 | 23.8 |
| SR3 | 90 | 70 | 328 | 24 |
| SRM | 58 | 55 | 313 | 23.9 |
Files:
SR2 data is from a free swing displacement amplitude spectral density measured on 28/05/2020
/kagra/Dropbox/Subsystems/VIS/TypeBData/SR2/quality_factors/SR2-AllStages-FreeSwing-ControlOff.xml
BS data comes from TF today measurements located at
/kagra/Dropbox/Subsystems/VIS/TypeBData/BS/TF/Measurements/20200911/
For the BS there is also a free swing displacement spectral density in the same directory.