*** July 9th, 2024  - 63 Hz bump investigation ****

We are using the accelerometer ENV_IB_CT_ACC_X as  sensor for the sniffing


08:30 UTC - Matthieu installed a beam dump on EPRB

09:38 UTC - cable disconnetions of the EPRB piezo

09:50 UTC - tapping on EPRB, resonances at 63 Hz and 110 Hz

09:56 UTC - installation of the accelerometer on WI rack 

14:13 UTC - Alberto Gennai sped-up the fans of both WI SAT creates

14:45 UTC - sweep injection in the freq band (60-65) Hz with small shaker on the floor, South side of WI tower

14:48 UTC - same shaker position on the metallic bar and line injected at 62 Hz

14:49:50 UTC - same shaker position on the mettalic bar and line injected at 60 Hz

14:50 UTC - shaker on tower base of WI and line injected at 60 Hz

14:55 UTC - shaker position on the metallic bar and line injected at 60 Hz

14:58 UTC - shaker on EPRB and injected line a 60Hz 

15:03 UTC - shaker on EPRB 62 Hz volume higher

15:16 UTC - shaker on the metallic bar  and line injected at 60 Hz

15:20 UTC- shaker on PR tower base, west side  and line injected at 60 HZ

15:26 UTC - shaker on PR tower base, west side  and sweep injection in freq band (50-80) Hz