J. Oberling, R. Short

After our work in the PSL enclosure this morning (see Jason's alog82636 for details), Jason and I made our way back to the control room for our last few tasks. From there, we first calibrated the PDs after each amplifier using the measurements made on-table. Since it had been enough time where we felt that the environment had settled down enough in the enclosure with the fans off, I attempted some more PMC alignment using the picomotors and was able to get PMC transmitted power up to just above 105W. With the PMC looking good, I enabled the ISS and adjusted the RefSignal to bring the diffracted power back down to around 4% (and accepted the RefSignal in SDF). We then were able to lock the RefCav and touched up the alignment here also, but there wasn't much to gain; the signal on the FSS TPD currently hovers around 800mV.

With the PSL recovered, I ran a rotation stage calibration since the output power of the PMC had changed as a result of our work today. Appropriate screenshots of SDF and the fit are attached.