sheila.dwyer@LIGO.ORG - posted 23:04, Monday 14 January 2019 - last comment - 10:09, Tuesday 15 January 2019(46414)
ETMX bias increased, actuator sweeps done
Sheila, Georgia, Craig, Koji
We changed the ETMX ESD bias back to 430 V, because we have been having many of the glitches that saturate the ESD drive, and also some locklosses where we were running out of range on the ETMX ESD. Before this change the RMS was approaching 2e4 counts (we have a 20 bit DAC), but now it is about 1e5. This is undoing the change in 45193
After this change we went to the calibration measurement guardian state and started actuation sweeps. They have been saved in the calibration SVN.
I've exported and committed the above mentioned actuator sweep measurements. Thanks all!! The files live here: /ligo/svncommon/CalSVN/aligocalibration/trunk/Runs/O3/H1/Measurements/FullIFOActuationTFs/ 2019-01-14_H1SUSETMX_L1_iEXC2DARM_25min.xml 2019-01-14_H1SUSETMX_L1_PCAL2DARM_8min.xml 2019-01-14_H1SUSETMX_L2_iEXC2DARM_17min.xml 2019-01-14_H1SUSETMX_L2_PCAL2DARM_8min.xml 2019-01-14_H1SUSETMX_L3_iEXC2DARM_8min.xml 2019-01-14_H1SUSETMX_L3_PCAL2DARM_8min.xml