Reminder: we attenuated the power by half to the IMC refl diode and IMC WFS after a power outage during O4, 86884, using a half wave plate along the refl path in IOT2L.

The attenuation was such that we maintained the desired power on IMC refl and the WFS by reducing the refl path power by 2, 86989, in other words, whatever the power outage did to the upstream mode matching, it was such that the power reflected off the IMC when locked had doubled.

To summarize, our nominal power to IMC refl when locked with ~60 W input is 18.5 mW. The WFS nominal is 0.95 and 0.76 mW respectively.

Now we have JAC, so I checked the powers at IMC REFL. Looks like the JAC team turned up the input power to the IFO to 60 W recently. For 60 W input with IMC locked (guardian state 100), we now have 1.57 mW on IMC REFL, 0.079 and 0.064 mW on WFS A and B. I think this indicates we should adjust the half wave plate to increase power to IMC REFL. I'm not sure if we can get back to nominal since the powers are more than an order of magnitude lower than before, but we should be able to at least double it.

Reminder that the "IMC PWR IN" diode is actually reporting the power into JAC. We have a JAC trans diode, but it still has a funny calibration, so I did not include it here because the number it says is totally wrong.