Reports until 12:19, Thursday 25 July 2019
H1 AOS
rahul.kumar@LIGO.ORG - posted 12:19, Thursday 25 July 2019 (50824)
SDF difference for M0 Offset for ETMX and ETMY

J. Kissel and  Rahul

This morning Jeff Kissel and I went through the SDF differences for ETMX and ETMY and found that the signs for the ETMX and ETMY top mass (M0) misalignment values were recently flipped. We trended the misalgiment values and found that these we last flipped on Feb 26, 2019 (after a DAQ restart LHO alog 47136). Given below are the channel name where the values of the misaligned state for the ETMX and ETMY are stored.

H1:SUS-ETMY_M0_TEST_Y_OFFSET     Feb 26, 2019 (flipped from -16 to +8). 09 July 2019 flipped from +8 to -8

H1:SUS-ETMY_M0_TEST_P_OFFSET     Feb 26, 2019 (flipped from -20 to +10). 09 July 2019, flipped from +10 to -10

H1:SUS-ETMX_M0_TEST_Y_OFFSET     Feb 26, 2019 (flipped from +8.60 to -8.60). 25 July 2019, flipped from -8.60 to +8.35

H1:SUS-ETMX_M0_TEST_P_OFFSET    Feb 26, 2019 (flipped from -9.77 to +10.41). 25 July 2019, flipped from 10.41 to -10.41

We have reverted the values for ETMY and accepted the values for ETMX. I am attaching a screenshot of the trends for the ETMX and ETMY, along with the SDF difference.

 

 

 

Images attached to this report