DQ Shifter: Yanyan Zheng

Email:zytfc@umsystem.edu

Fellow(s): Sudarshan

Mentor:NA

Summary:

Lock/Range

• Duty cycle in observing is (91.7%+60.6%+79.5%+77.2%+95.0%+88.7%+79.2%)/7=81.7%.
• Earthquake from Arctic, Russia and Japan on Tuesday, Thursday and Friday caused the lockloss.
• The average BNS range is ~118Mpc.
• On Wednesday, the range dropped to 108Mpc from 10:00-12:00 maybe because of out of observe to relock squeezer(alog55175)

Noise/Strain

• Violin modes at 500Hz and 1000Hz can be seen most time of the week.
• And on Thursday, violin modes at 1300Hz presented from 16:00-18:00
• ~33Hz excess noise can be seen most time in the week.(For example, 8am on Wednesday)
• On Sunday, loud noise presented at 17:30-18:30. It may come from the high speed wind.

Dechar:

• On Sunday, H1:LSC-POP_A_RF45_Q_ERR_DQ and :ASC-DHARD_P_OUT_DQ vetoed the loud noise at 18:00.
• H1:ASC-Y_TR_A_NSUM_OUT_DQ vetoed the low frequency noise on Monday, Wednesday,Thursday,Friday and Saturday.

Pcal:

• Pcal X : There is a small peak at ~18Hz on Monday and Tuesday but disappear on Wednesday until Sunday. And the line became smooth on high frequency after Wednesday. It looks like the optical follower servo saturated and so the PCAL is not able to inject lines for normal operations(alog55257).
• Pcal Y: nothing unusual.

Spectra: Nothing unusual.

Full report can be seen here:https://wiki.ligo.org/DetChar/DataQuality/DQShiftLHO20200217