aLIGO LHO Logbook

H1 INJ (DetChar, INJ)

christopher.biwer@LIGO.ORG - posted 21:19, Saturday 21 November 2015 - last comment - 15:00, Tuesday 24 November 2015(23631)

Finishing swept sine in INJ_HARDWARE filterbank

LLO had called and said they would be down for awhile.

I'm going to finish doing a swept-sine through the INJ_HARDWARE filterbank from 5-500Hz. Previously I had only finished 500-2000Hz.

The IFO intent mode has been turned off.

This is WP#5595.

Comments related to this report

christopher.biwer@LIGO.ORG - 21:53, Saturday 21 November 2015 (23633)DetChar, INJ

Link

Previous swept-sine measurement was: aLog 23307

The following was done:
 * psinject turned off at 5:20 UTC
 * swept sine measurement started at 5:21 UTC
 * swept sine measurement ended at 5:48 UTC
 * psinject turned on at 5:49 UTC

I've attached a plot of the transfer function and coherence between INJ_CW and DELTAL_EXTERNAL_DQ.

WP#5955 is now complete.

Images attached to this comment

keith.riles@LIGO.ORG - 18:32, Monday 23 November 2015 (23683)

Link

Attached are results of computing a transfer function from 
H1:CAL-INJ_CW_OUT to H1:GDS-CALIB_STRAIN, using the
same method used for the higher-frequency swept sine on Nov 11.

The transfer function is generally flat and well behaved
below 500 Hz and above ~35 Hz. The feature at 167 Hz
appears to be an artifact of the swept sine measurement
at that point being artificially split into several points. 

Figure 1 - Spectogram of H1:CAL-INJ_CW_OUT during swept sine
Figure 2 - Spectogram of H1:GDS-CALIB_STRAIN during swept sine
Figure 3 - Transfer function and coherence

More detailed results can be found here.

Images attached to this comment

christopher.biwer@LIGO.ORG - 15:00, Tuesday 24 November 2015 (23708)DetChar, INJ

Link

The DTT template for doing the 5 to 500Hz swept-sine measurement is in the SVN here: template_cw_inj_sweptsine_5to500_20151121.xml

The DTT template for doing the 500 to 2000Hz swept-sine measurement is in the SVN here: template_cw_inj_sweptsine_500to2000_20151111.xml