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Message ID: 443     Entry time: Fri Jul 11 16:15:12 2025
 Author: Ronic Chiche 
 Status: Fixed 
 Type: info 
 Category: lasers and optics | detectors and electronics 
 Location: ThomX igloo 
 Title: Tuning of the slow feeback loop analog BW + fast feedback loop gain + PID 

Today with Daniele, we tuned the potentiometer after the Laselock which drives the analog BW of the PID on the laser PZT,
and we tuned also the fast loop gain (with the rotary potentiometer dedicated to it) => the PID parameters have changed.

so, the recipies has changed => to be updated

the global observation with the x3 amplifier on the laser PZT channel, is the system is more noisy.
the maximum power for 33% amp ratio is now ~93kW instead of 97-98kW.

we tried this afternoon to do a long run with the RF and the FPC loops activated, but it seams that a lot of high frequency noise is present.
is it coming from the new parameters feedback setup or because of the electron machine which is ON ?

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