jeffrey.kissel@LIGO.ORG - posted 15:49, Wednesday 04 December 2019 - last comment - 13:59, Friday 05 February 2021(53683)
Calibration Measurements: Full Suite today -- Plus Several Other Good Firsts
V. Bossilkov, S. Karki, J. Kissel, T. Mistry
We've gathered an entire set of calibration measurements today (Full Actuation and Sensing Function Suite), as well as gathering several bonus measurements, exploring
- the high frequency dynamics of the UIM (now that we've identified that they are indeed important)
- a "sweep" of the NCAL system, to see how the NCAL excitation looks as a function of frequency
- whether the L2A2L coupling is non-linear
This'll be days work of analysis work, so stay tuned for future results.
For now, here're the templates for the standard measurements, I'll leave it to Timesh, Vlad, and Sudarshan to log there files.
Sensing Function:
/ligo/svncommon/CalSVN/aligocalibration/trunk/Runs/O3/H1/Measurements/FullIFOSensingTFs
2019-12-04_H1_DARM_OLGTF_LF_SS_5to1100Hz_15min.xml
2019-12-04_H1_PCALX2DARMTF_LF_SS_5t1100Hz_10min.xml
2019-12-04_H1_PCALY2DARMTF_LF_SS_5t1100Hz_10min.xml
2019-12-04_H1_PCALX2DARMTF_BB_3min.xml
2019-12-04_H1_PCALY2DARMTF_BB_3min.xml
Actuation Function:
/ligo/svncommon/CalSVN/aligocalibration/trunk/Runs/O3/H1/Measurements/FullIFOActuationTFs/
2019-12-04_H1SUSETMX_L1_iEXC2DARM_8min.xml
2019-12-04_H1SUSETMX_L1_PCAL2DARM_5min.xml
2019-12-04_H1SUSETMX_L2_iEXC2DARM_12min.xml
2019-12-04_H1SUSETMX_L2_PCAL2DARM_6min.xml
2019-12-04_H1SUSETMX_L3_iEXC2DARM_12min.xml
2019-12-04_H1SUSETMX_L3_PCAL2DARM_6min.xml
#ThesisWork!
Vlad:
Measured an extra swept sine of the UIM to DARM dynamics, and Pcal-Y to DARM, to aid in filling in gaps in the transfer function of the UIM dynamics between 200 and 1000 Hz.
Due to misconfiguration of the sweep, I have slightly driven the violin modes despite trying to deliberately not sweep through them.
The intention is to complete making the UIM dynamics transfer function as and independent filter that can be applied in both foton and pyDARM in the near future.
We made some A2A and A2L to DARM transfer function measurements, few weeks ago, using broadband excitations and noticed some phase mismatch between the measurement and the model (LHO alog #53627). In order to make sure the phase mismatch was not due to some non-linear coupling due to the high coherence excitations, we made additional measurements using sinusoidal exciations with few different amplitudes. Initial observation shows that the phase mismatch still exists but will post more detail information (with plots) soon.
NCAL Measurements:
During the calibration measurements, I use the NCAL to take a sensing sweep. Using the PCALX frequency sweep points as a template and calulated the spin frequency required to spin the NCAL such that the 2F signal is as close to the PCALX frequency as possible.
First, I took an OLG measuement using frequency sweep points equal to that of the expected NCAL 2F and 3F signals:
After the OLG sweep was completed, from the control room, the NCAL was spun at the given NCAL counts given in the table below. At least 120 seconds of intergration time was allowed in order to ensure sufficient SNR.
Once the NCAL sweep was completed, a PCALX and PCAL Y to DARM dtt template with the following drive counts and frequencies was run with the following PCAL counts drive and frequencies:
The NCAL electronics has been laid to rest:
Times given below are approximatly the time the task was done.
1259537718 (4 Dec 2019 23:35 UTC ) -> Unplugged AC power, ethernet and DC power from NCAL Beckhoff Motor Controller
1259537838 (4 Dec 2019 23:37 UTC ) -> Unplugged BNC cable from EE mid bay chassis
1259537958 (4 Dec 2019 23:39 UTC ) -> Unplugged ethernet from NCAL Beckhoff PC
Summary
I have added the NCAL measurement to the CALSVN at revision number 8883. These files have been extracted and have been extracted in a way that should enable pyDARM to read in the files and produce a sensing function result for NCAL. Some modifications will be required to fold in the DARM OLG, PCALX, PCAY and NCAL sweeps.
Files added:
SVNDIR = /ligo/svncommon/CalSVN/aligocalibration/trunk/Projects/NewtonianCalibrator/measurements
^/20191204-SensingMeasurements
^/20191204-SensingMeasurements/2019-12-04_H1_DARM_OLGTF_NCAL_5-30Hz_A_DARMIN2_B_DARMEXC_COH.txt
^/20191204-SensingMeasurements/2019-12-04_H1_DARM_OLGTF_NCAL_5-30Hz_A_DARMIN2_B_DARMEXC_TF.txt
^/20191204-SensingMeasurements/2019-12-04_H1_DARM_OLGTF_NCAL_5-30Hz_A_DARMIN2_B_DARMIN1_COH.txt
^/20191204-SensingMeasurements/2019-12-04_H1_DARM_OLGTF_NCAL_5-30Hz_A_DARMIN2_B_DARMIN1_TF.txt
^/20191204-SensingMeasurements/2019-12-04_H1_DARM_OLG_NCAL_5-30Hz.xml
^/20191204-SensingMeasurements/2019-12-04_H1_PCALX2DARMTF_NCAL_5-30Hz_A_PCALXRX_B_DARMIN1_COH.txt
^/20191204-SensingMeasurements/2019-12-04_H1_PCALX2DARMTF_NCAL_5-30Hz_A_PCALXRX_B_DARMIN1_TF.txt
^/20191204-SensingMeasurements/2019-12-04_H1_PCALX2DARMTF_NCAL_5-30Hz_A_PCALXRX_B_DELTALEXT_COH.txt
^/20191204-SensingMeasurements/2019-12-04_H1_PCALX2DARMTF_NCAL_5-30Hz_A_PCALXRX_B_DELTALEXT_TF.txt
^/20191204-SensingMeasurements/2019-12-04_H1_PCALX2DARM_NCAL_5-30Hz.xml
^/20191204-SensingMeasurements/2019-12-04_H1_PCALY2DARMTF_NCAL_5-30Hz_A_PCALYRX_B_DARMIN1_COH.txt
^/20191204-SensingMeasurements/2019-12-04_H1_PCALY2DARMTF_NCAL_5-30Hz_A_PCALYRX_B_DARMIN1_TF.txt
^/20191204-SensingMeasurements/2019-12-04_H1_PCALY2DARMTF_NCAL_5-30Hz_A_PCALYRX_B_DELTALEXT_COH.txt
^/20191204-SensingMeasurements/2019-12-04_H1_PCALY2DARMTF_NCAL_5-30Hz_A_PCALYRX_B_DELTALEXT_TF.txt
^/20191204-SensingMeasurements/2019-12-04_H1_PCALY2DARM_NCAL_5-30Hz.xml
^/20191204-SensingMeasurements/NCAL_OLG_points.txt
^/20191204-SensingMeasurements/PCAL_NCAL_Sweep.txt