jeffrey.kissel@LIGO.ORG - posted 16:04, Monday 11 November 2019 - last comment - 13:27, Tuesday 12 November 2019(53162)
Calibration Measurements: Full Suite Today -- First After PCAL Coeffs Updated, Some Exploration of UIM L2A2L
S. Dwyer, S. Karki, J. Kissel We gathered the full suite of calibration measurements today; measurement templates listed below. Analysis and commentary to come! We're at 38W of PSL input power (33.5 W input to PRM), SRCL offset is at 50 ct. DARM cavity pole (according to calibration line TDCFs) is 411 Hz. Sensing Function: 2019-11-11_H1_DARM_OLGTF_LF_SS_5to1100Hz_15min.xml 2019-11-11_H1_PCALX2DARMTF_LF_SS_5t1100Hz_10min.xml 2019-11-11_H1_PCALY2DARMTF_LF_SS_5t1100Hz_10min.xml 2019-11-11_H1_PCALX2DARMTF_BB_3min.xml 2019-11-11_H1_PCALY2DARMTF_BB_3min.xml Actuation function: 2019-11-11_H1SUSETMY_L1_iEXC2DARM_8min.xml 2019-11-11_H1SUSETMY_L1_PCAL2DARM_5min.xml 2019-11-11_H1SUSETMX_L1_TESTEXC_iEXC2DARM_5to100Hz_17min.xml 2019-11-11_H1SUSETMX_L2_iEXC2DARM_12min.xml 2019-11-11_H1SUSETMX_L2_PCAL2DARM_6min.xml 2019-11-11_H1SUSETMX_L3_iEXC2DARM_12min.xml 2019-11-11_H1SUSETMX_L3_PCAL2DARM_6min.xml
We did actuation measurement of the UIM stage to see if any angle to length coupling shows up in DARM. We measured the DARM signal by once driving through the L1 TEST that bypasses the drivealign filter bank and later through L1 CAL EXEC that goes through the drivealign filter bank. We didnot see any significant difference between the two measurements as shown in the plots attached below. Another null result but a step towards trying to understand the low frequency calibration.
The scripts used to analyze and generate these plots can be found here:
/ligo/svncommon/CalSVN/aligocalibration/trunk/Runs/O3/H1/Scripts/FullIFOActuationTFs/process_actuationmeas_UIM_DRIVEALIGN_20191111.py