DQ Shifter: Vaishali Adya

Email: vaishali.adya@anu.edu.au

Mentor : Paul Altin

Fellow(s): Kara Merfeld

Summary (highlights) of the DQ Shift for an aLog:

• Hveto has picked out H1:LSC-REFL_A_LF_OUT_DQ from Wednesday to Sunday
• 511 Hz violin mode present prominently after all locklosses
• Very odd range drops that do not coincide with any PEM or BLRMS channels (that I have noticed). These range drops are sharp and turn on and off suddenly. On Thursday : 5 MPc (02:25 UTC), Friday : 5 MPc (01:20 UTC) and 06:30 UTC, Saturday : 5 MPc (19:48 UTC) and at 22:30 UTC.
• Overall duty cycle : 75.24 %
• 48 Hz line present prominently throughout the shift
• Lockloss study suggests : ADS glitches to be the reason of some locklosses during the shift (alog)
• VCO glitches strongly correlated to ground motion
• BRS - X temperature increase (alog)
• Hardware injections successful (alog)

Full report: https://wiki.ligo.org/DetChar/DataQuality/DQShiftLHO20190902