DQ Shift: December 14 2018 1600 UTC to December 18 2018 1400 UTC

DQ Shifter: Jeffrey Bidler
Email: jeffrey.bidler@ligo.org

Mentor: Jess McIver

DQ shift shadows: Jax, Ryan

General

Call to action at Alog 45924 for help with problems with fast ALS glitches "since its so tough to diagnose, it would be good to develop some code to find this glitching issue and report it on the ALS screen as a kind of Fault condition."

H1:LSC-REFL_A_RF9_Q_ERR_DQ show up as round 1 winner on all days in Hveto and H1:LSC-POP_A_LF_OUT_DQ shows up as a winner or a related channel. H1:LSC-REFL_A_RF9_Q_ERR_DQ always with scattering in strain or with scattering in a different channel

Harmonics on the 15th and 16th are being looked in to in the Alog posted at 46045: The harmonics can be seen in the glitchgram were related to CS accelerometers and looks to be something switching states

Friday Dec 14

Summary

• no real range to look at
• seismic and PEM channels are normal

Detchar

• Hveto - No segments avalible
• PyCBC - No segments avalible

Saturday Dec 15

Summary

• Range is about 60-70 Mpc

  • Its the first good amount of data we've got

  • In lock 1930-2330: range goes from averaging 70 Mpc to 60 Mpc

• glitchgram

  • High SNR glitches in bucket as expected

• h(t) spectrogram

  
  

  • 1st sighting of the harmonic switching on-off around 100 Hz from about 1930 to 2330

• glitch rate

  • Nothing sticks out glitches and glitch rate look normal for LHO

SEI/Ground/BLRMS_overview

• high wind and micro-seismic
• crazy winds can be blamed for no locks 0400 to 1900
  

  • latest wind ends when 1900 lock begins

PEM - all but especially seismic and acoustic

• Accelerometers and Acoustic Overwhelmed by the high winds

Detchar

Hveto:

• scattering for rnd 1, non-liniar scattering rnd 2
• ringing up in PyCBC live

Round 1, Winner = H1:LSC-REFL_A_RF9_Q_ERR_DQ

• High Frequency, low SNR

• only LSC at input optics see this glitch

• all but the last Omega scan look like scattered light

• interesting with high frequency and because it may cause high pyCBC trigger

• last one looks like a whistle

Round 2, Winner = H1:LSC-POP_A_LF_OUT_DQ

• Hits many of the high SNR triggers

• all auxilary channel glitches are significant

• interesting related glitched channels in PSL ASC and PEM

• omega scans look like loud blue mountain scattering???

• differential heating?

Round 3, Winner = H1:ASC-AS_B_DC_PIT_OUT_DQ

• hits many of the low SNR glitches in the bucket

Round 4, Winner = H1:ASC-Y_TR_B_PIT_OUT_DQ

• not may hits, all lower SNR

PyCBC

• one group of triggers at 2100 with a tail reaching past 14 SNR in short and medium and past 9 SNR in long, it lines up with a short drop in range

Sunday Dec 16

Summary

• Range is about 70-80 Mpc when stable

  • early on it drops from almost 80 to about 25Mpc

  • One short drop is at about the same as a very loud glitch

  • h1lsc saturation lines up with lock loss at about 1940

  • h1susetmx saturation lines up with short range drop at 2030

• glitchgram

  • More higher SNR glitches around 40-60 Hz

• h(t) spectrogram

  • Short harmonics from yesterday are still around

• glitch rate

  • One short drop is at about the same as a very loud glitch

Lock/Sensitivity/strain

• Short harmonics are still around

SEI/Ground/BLRMS_overview

• much quiter, something at about 1030

PEM - all but especially seismic and acoustic

• Wind is gone but Accelerometers are still noisy

• harmonic causing noise is probably there but we cannot see it at this time scale

Detchar

Hveto

Round 1, Winner = H1:LSC-REFL_A_RF9_Q_ERR_DQ

• 2nd day it is round 1 winner
• 3/5 of the spectrograms are scattered light arches
• less significant than earlier but still have the same related channel

Round 2, Winner = H1:LSC-POP_A_LF_OUT_DQ

• few but high SNR triggers in primary channel
• related channels in ASC and PEM

Round 3, Winner = H1:ASC-AS_B_DC_PIT_OUT_DQ

• few low SNR triggers
• Omega scans include a line at 30 Hz

Monday Dec 17

Summary

• No Locks longer than 20 minutes, and almost never gets past low noise
• Glitchgram
  • Glitchgram is similar to the other days
• h(t) spectrogram
  • Strange Harmonics are gone, Now we have some 500Hz line coming in and out test mass SUS ringing up
• Are there any anomalies in the glitch rate for loud glitches?

SEI/Ground/BLRMS_overview

• ~5 m/s winds 0500 to 0800 and 3-10Hz seismic 1200 to 1700. Neither corrolated with h(t)
• seismic 1-3Hz 2hr period

PEM - all but especially seismic and acoustic

• Are there any significant changes, especially new features, in the PEM channels?
  • All accelerometers show low frequency broad-band from 1200 to 2400 from people traffic

Detchar

• Hveto

Round 1, Winner = H1:LSC-REFL_A_RF9_Q_ERR_DQ

• 3rd day it is the winning channels
• more scattering arches
• less significant than earlier but still have the same related channel
• shows classical scattering and H1:LSC-POP_A_LF_OUT_DQ shows scattering

Round 2, Winner = H1:ASC-Y_TR_B_PIT_OUT_DQ

• Not many triggers but some high SNR
• related channels are in ASC, LSC and OMC
• maybe people in the LVEA

Round 3, Winner = H1:ASC-DHARD_Y_OUT_DQ

• only hits in primary are some high SNR triggers at 2230
• related channels in ASC and LSC
• all spectrograms include a 30Hz line in range
  • if it happends later just check if

PyCBC - Are there any specific times which ring off templates to a high ranking statistic value? If so can you pin down what is happening? Has the rate of triggers changed appreciably?

• only one lock has enough time to run PyCBC
• Lower peak SNR than past days only reaching 8.5 SNR