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Message ID: 101     Entry time: Tue Jul 7 12:49:38 2020
 Author: Ronic Chiche 
 Status: Fixed 
 Type: info 
 Category: lasers and optics 
 Location: Optical room 
 Title: Finesse measurement after the Edge installation 

After the Edge installation inside the cavity, the Finesse has been measured several times by modulation technique with an average around 16000:
(the scan speed is 50kHz in 10 seconds.)

So, it hasn't changed since the last measurement in June, just before the Edge installation.
The Edge position is normally the furthest from cavity beam (all rotating knobs are at 0 positions)

We used the last Onefive telescope (used with CVBGs). Coupling reached ~50% after alignment.
The cavity vacuum is ~7.2e-9 mbar as the cavity has been recently opened...

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