Reports until 19:52, Tuesday 19 April 2022
H1 SQZ (SQZ)
victoriaa.xu@LIGO.ORG - posted 19:52, Tuesday 19 April 2022 (62691)
OPO PZT1/2 slow scans, moved crystal position to higher NLG

Sheila, Daniel

Attaching slow scans of the OPO PZT1 and PZT2 actuators, with ~2mW lauched into the OPO pump fiber on SQZT0, following up from alog 62589. These slower scans with lower green power can better see the opo cavity's higher order mode spectrum between scanning OPO PZT 1 or 2.

Between these two PZT scans, the crystal position moved as I unplugged the translation stage oven connector from its driver. Got lucky, crystal moved to a spot with something almost like NLG~5 (see screenshot), with a new high-nlg co-resonance temperature at 34.075 C. Have not yet looked for a hot no_nlg_temp. Our issue of not driving the oven connector might be a mechanical connector issue? Next time, we can try to super plug in the oven connector to the driver connector, or maybe it needs to be very carefully wiggled a bit? More figuring out needed to get the connector working reliably.

Images attached to this report