Meetings

• Meeting time: 13:00-13:30 JST/KST on every Monday
• Meeting room: Zoom

Agenda & Minutes

20220307 (Mon.)

• Agenda
  • announcement

    • RRT plan during O4 slide

    • LVK meeting March 2022 wiki web

      • registration is available
  • 120Hz glitches investigation during O3GK
  • unify conda environment in Kamioka detchar computers, k1sum[01] and k1det[012] (YamaT)
  • DQ flags for O4
  • DQR update
• Minutes
  • 120Hz glitches investigation during O3GK
    • no update
  • unify conda environment in Kamioka detchar computers, k1sum[01] and k1det[012] (YamaT)
    • There are many computers/workstations in Kamioka site or Kamioka control room.
    • Workstations (k1ctr*) use common conda environment by mounting the file server.

    • In DetChar computers k1{sum,det}[01], conda environment should be unified all DetChar resources, similar to workstations.

    • To prevent the trouble that DetChar experts might break the environment, the conda environments will be set as read-only permission.

    • Installation will be done by Kamioka members. After that, we need volunteers to test the DetChar tools on new conda environment.

    • what is the time line?
      • Installation will finished before the end of March. From April, the test will start. Volunteers are helpful.
  • DQ flags for O4

    • In last PEM meeting, Yuzurihara presented the current status and received the helpful comments. [slide](https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=13970)

    • We will change our plan to construct the data quality flag and will compute the BLRMS of gwpy to set the threshold.
    • The review is necessary before O4. (probably very close to O4, because we need ER)
  • DQR update
    • no update
  • Commissioning of GreenX
    • In the last weekend, the commissioner tried continuous GreenX. During that trials, they found many short term lock loss (~10 ms). 10 ms is too short to follow the suspension motion, so it is likely that there are some causes of the lock loss except for the suspension motion.

    • The commissioner needs helps DetChar members to identify the cause or give a hint of the cause.

    • For details, see klog#19963 klog#19983

    • main channel K1:TMS-X_GR_PDA1_OUT_DQ
    • time : 2022 Mar 06 23:37:50 UTC = 2022 Mar 07 8:37:50 JST = GPS time 1330645088

20220228 (Mon.)

• Agenda
  • 120Hz glitches
  • DQ flags for O4
  • progress of DQR
  • lock loss study of GreenX
• Minutes (Yuzurihara)
  • accouncement

    • LVK meeting March 2022 wiki web

      • registration is available
      • Wed, 17 March 2021:
        • Plenary Session #1 (09:00-10:30 US/CDT) (=3/16 23:00 JST)
        • Paper Presentation Session #1
        • Plenary Session #2 (16:00-17:30 US/CDT) (=3/17 6:00 JST)
      • Thu, 18 March 2021:
        • Plenary Session #3 (09:00-10:30 US/CDT) (=3/17 23:00 JST)
        • Paper Presentation Session #2
        • Plenary Session #4 (16:00-17:30 US/CDT) (=3/18 6:00 JST)
    • Pastavi server will be unavailable tonight

      • klog#19913

  • 120Hz glitches
    • no update
  • DQ flags for O4
    • no update
  • progress of DQR
    • igwn-alert is running more than 9days and receiving the MDC alert

    • next step is to connect the MDC alert with the launch TaskManager.

    • remained task is to develop InspiralRange issue

  • lock loss study of GreenX

    • klog#19906

    • From the Hveto result, the channel (K1:IMC-SERVO_MIXER_DAQ_OUT_DQ) was the most coincident channel with the lock loss of GreenX.
  • unify the detchar computing environment (YamaT)
    • scattered codes and applications (Omicron, summary page, ) over Kamioka computers are troubling.
    • we plan to unify the environment by using igwn conda
    • detail will be reported in next meeting
    • (Darkhan) conda environment on k1ctr*. someone accidentally update someone's conda environment. administrator should prepare the conda environment?
    • (YamaT) k1ctr* share the environment. this activity is not related to k1ctr* but k1sum[01], k1det[012]. we should separate the user environment and the environment for the DET tools
    • (Darkhan) should avoid accidental mistake.

20220221 (Mon.)

• Agenda
  • 120Hz glitches
  • DQ flags for O4
  • progress of DQR
• Minutes
  • 120Hz glitches
    • No updates
  • DQ flags for O4
    • No updates
  • progress of DQR

    • klog#19847

  • Proposal new tool to see past data by NDS (Darkhan)

20220207 (Mon.)

• Agenda
  • 120Hz glitches

  • Report from LIGO Detchar F2F Meeting

  • DQ flags for O4
  • progress of DQR
• Minutes
  • 120Hz glitches
    • No updates
  • DQ flags for O4

    • slide

    • (Yuzurihara) read BLRMS data and made the several plots with 1% and 99% percentile.
    • When KAGRA will be locked as observation mode?
      • hopefully after july, there will be lock trial for two monthes(?)
    • When you set the 1% criteria, always you throw away the 1% data?
      • We might need to consider the better procedure to care that point.
  • progress of DQR

    • klog#19671

20220131 (Mon.)

• Agenda
  • 120Hz glitches
  • Report from DQR hackathon
  • DQ flags for O4
  • Master thesis (Morisue-san)

20220117 (Mon.)

• Agenda
  • 120Hz glitches
  • ITMX glitches
  • DQR progress
  • DQ flags for O4
• Minutes
  • 120Hz glitches
    • No updates
    • Next step is coincidence search with signals around ETMY including local control sensors.
  • ITMX glitches

    • klog#19212

    • K1:VIS-ITMX_F3_LVDTINF_GAS_{IN1,OUT} have glitches.
    • It seems to occur around AA chassis. (AA and cable replacement didn't help to improve situation).
    • We will try to find glitches on other channels on the same ADC board.

    • This channel should be added to Omicron search on SummaryPages.

  • DQR progress

    • JGW-G2213721

  • DQ flags for O4
    • No updates
  • O3GK paper
    • Threshold used for computing a glitch rate was changed as SNR=6.5.
    • It's a same criterion with LIGO, and Virgo.
    • Both GEO and KAGRA's results are now computed and draft was also updated.

Past meeting

• 2021

• 2020

• 2019