today, I installed a laser dump just before the telescope to avoid any high power (50W instead of 17W usually) issue in the injection line.
last time, we saw some plastic mounts of the polarizers slightly burnt because of some small misalignment.
I used a thorlabs LB2 (see picture) which is able to manage 80W CW or 25J/cm2 pulses => this is OK in both cases : 50W CW / 1.5µJ/pulse for ThomX.

I started the laser amplifier at 70% which produces 50W at the amplifier output and 45W at the input of the FPC.

start : 15h10
immediately, the Temp Amp1 increases from 26°C to 30°C
the Temp Amp2 stays around 26°C
PD_OUT = 79,2W

start + 5-10 min
Temp Amp1 : 31°C
Temp Amp2 : 27°C
PD_OUT = 79,2W

start + 30 min
Temp Amp1 : 31,6°C
Temp Amp2 : 27,5°C
PD_OUT = 79,2W

start + 1h00
Temp Amp1 : 31,6°C
Temp Amp2 : 27,6°C
PD_OUT = 79,2W

start + 1h30
Temp Amp1 : 31,7°C
Temp Amp2 : 27,7°C
PD_OUT = 79,2W

start + 2h00
Temp Amp1 : 31,7°C
Temp Amp2 : 27,7°C
PD_OUT = 79,2W

start + 2h30
Temp Amp1 : 31,7°C
Temp Amp2 : 27,7°C
PD_OUT = 79,2W