Reports until 18:47, Monday 30 September 2024
H1 DetChar (DetChar)
yashasvininad.moon@LIGO.ORG - posted 18:47, Monday 30 September 2024 (80382)
DQ Shift LHO 16 Sept- 22 Sept 2024
1. The average duty cycle for Hanford for this week was 69.25%, with a high of 95.6% on Friday
2. The BNS range fluctuated between 150-160 Mpc, the lower end 150 Mpc is due to high winds

3. Strain lines in h(t):
   Some of the strain lines especially lower frequency can be explained due to ground motion
   Noise lines in h(t) spectrogram every day at 500Hz most of them can be correlated to after H1 gets locked back, but some of these persist. I 
   have attached a plot highlighting it


4. Some glitch clusters happen right before losing lock and can be explained by comparing to alogs, others (the one tuesday) are unexplained

5. Lockloss:
   Some locklosses can be explained due to increased ground motion (eg: monday, wednesday and friday locklosses)
   First FSS_OSCILLATION lockloss from NLN in a year on wednesday 18th Sept
   Another lockloss that tagged FSS on Thursday
   Lockloss with FSS oscillation tag on Saturday

6. PEM tab:
   Most of the noise in corner BSCs happens when H1 is not observing
   Noise in acoustics can be related to environmental factors like wind
   Recurring noise line in BSC1 motion X and sometimes other BSCs too at ~11 Hz every day starting at 15:00 UTC

7. H1:ASC-DHARD_Y_OUT_DQ and H1:PEM-EX_EFM_BSC9_ETMX_Y_OUT_DQ are present multiple times in the hveto tab, there are also some new channels.
8. The fscan plots have appeared and the line count varies from 600 to ~850 with an average of 684.
Images attached to this report