Reports until 00:46, Tuesday 29 January 2019
H1 ISC (ISC)
georgia.mansell@LIGO.ORG - posted 00:46, Tuesday 29 January 2019 (46682)
power_up_on_rf flag

Georgia, Craig

We had a few fast locklosses from INCREASE_POWER tonight. After taking CARM and IMC OLTFs we realised that the OMC_DCPD_SUM_OUT was going up to 40 mA before we lost lock. We then quickly realised that the power_up_on_RF in LSC params was still true. We have switched this off and reached nominal low noise again.

We had acquired lock just fine with the new low-gain DC centering loops (DC3 pit and DC4 pit). I tried engaging the gentler DHARD pitch cut off (FM4) at NLN but promptly caused a lockloss.