Stefan, Yuta, Kiwamu

We are currently in a low power state for performing the PRM parking beam search.

Power decreased:

We decreased the IMC incident to approximately 100 mW by rotating the motorized half wave plate. We unlocked the interlock to allow us to rotate it while blocking the main laser pipe just in case. Currently the incident power is at 116 mW at the monitor channel, H1:PSL-PERISCOPE_A_DC_POWERMON. Then we locked the interlock back so that nobody can change the power.

Autolocker modified:

We then changed the ISC_IMC guardian script to adapt it to this lower power configuration. The threshold and in1 gain are increased by a factor of 10. Also all the LSC and ASC triggers are lowered by a factor of 10. We found that increasing the ASC common gain by a factor of 10 made the loops unstable. Therefore we set the common gain to be back at 1 as usual. So far it seems locking fine and stable enough to proceed with the parking beam mission.