Reports until 14:50, Thursday 28 March 2024
H1 ISC
sheila.dwyer@LIGO.ORG - posted 14:50, Thursday 28 March 2024 - last comment - 10:28, Thursday 04 April 2024(76768)
range comparison plots

Kevin and Vicky helped to get the old range comparison plots from the noise budget working with some updates to the noise budget.  The first plots show the spectra, range integand and the cumulative range for a comparison between O4a and a few days ago.  This is range calculated by gwinc, the sensmon range is shown in the legend. 

Looking at the darm spectra and the range difference plot here, you can see that we gained about 15Mpc of range from low frequency improvements including DARM offloading.  Above 40Hz our recent sensitivity has been worse, we lose 15 Mpc from the decreased sensitivity beween 40-100 Hz and another 7 or so from the worse sensitivity above 100Hz. 

Last night we had slightly better BNS range after the squeezer alignment work 76757 , the same comparison of O4a to last night shows that we are loosing less range from 65-300 Hz, as shown in this plot as well. 

I've also made this comparison for no squeezing, using times from 76537 and 76540: here.  This shows that without squeezing the mid frequency sensitivity (30-70Hz) has gotten worse which is costing roughly 10Mpc of range.

Elenna's sensitivity comparison from a few weeks ago contains helpful links to recent changes: 76449

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sheila.dwyer@LIGO.ORG - 10:28, Thursday 04 April 2024 (76935)

first of all, apologies that the axis labels were switched in the above plots.

Second, instructions if you'd like to make these plots yourself for your own times:

cd /ligo/gitcommon/NoiseBudget/aligoNB/production_code/

conda activate aligoNB

open gps_reference_times.yml and either chooose some times from the list or add your own time dictonary.  If you add a time, please add it below the LHO and LHO_NO_SQZ entries (those are the ones that the noise budget uses), and add a helpful comment describing your time.

open H1/darm_integral_compare.py and edit lines 85 and 91 (after_gps_dict = gps_dict['LHO_ER16_April4'] and   b4_gps_dict = gps_dict['LHO_O4a_postvent']) so that it will plot your chosen tmes.

python H1/darm_intergal_compare.py

Your plots will be saved in /ligo/gitcommon/NoiseBudget/aligoNB/out/H1/darm_intergal_compare/