Differences between revisions 4 and 5
⇤ ← Revision 4 as of 2020-01-08 05:01:26 →
Size: 2242
Editor: TakaakiYokozawa
Comment:
← Revision 5 as of 2020-01-08 05:30:54 → ⇥
Size: 2708
Editor: TakaakiYokozawa
Comment:
Deletions are marked like this. Additions are marked like this.
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   * Only 80Hz vibration injection
   * Table may vibrate at 60Hz
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   * Auto pulse finding program
   * Automate fitting with background tuning
   * Yend Aco has 1.5Hz resonant peak
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Line 56: Line 59:
  * Pick up the items for the concern about the power supply and cabling
  * Check the cabling between rack and rack
  * Rack layout (for example, the Type-B use same circuit, rack design was different)
  * Use company for the cable re-connection
  * Reduce the plastic circuits

Weekly PEM meeting

  • 2020/01/08(Tue) 16:00-(JST)
  • Regular meeting meeting (Japanese)

  • Web meeting with Zoom2 (Zoom2)

  • member : Ohkawa, Oshino, TT, Kozakai, Washimi, Tomaru, yamat

Each progress

  • General issue
    • What is the material of the periscope at the REFL table?
    • How about LV meeting?
      • If we can get the result, it is better to join the GWADW at Hokkaido
    • It is better to join the young meeting at Kamioka
  • Yokozawa
    • Suspension resonant frequency (with CRY and VIS team)
      • Yamada-san proposed the resonant peaks for Type-A
      • 46Hz peak come from IM-PIT?
      • Protect the optical lever from the wind
    • Post ER report1
      • Stopped the FFUs and vacuum pumps.
      • We couldn(t detect the difference in the floor, but we could identify the some peaks
    • Planning toward the O3 run
      • Discussed in the general issue
  • Washimi

    • post ER JGW-G2011165

      • He investigated the noise between the FFU on and off more precisely
      • Line noises
      • Noise level was decreased at the 100Hz region
      • Disappear the 145Hz peak
      • He also tried to evaluate the coupling function by regarding the FFU as the injector
      • PEM injection for global area is not so significant, local injection is more significant
    • Beam jitter study (Follow Camilla study, reported by Yokozawa?)
      • Only 80Hz vibration injection
      • Table may vibrate at 60Hz

    • Sound reverberation study (KAGRA & Virgo)

      • Auto pulse finding program
      • Automate fitting with background tuning
      • Yend Aco has 1.5Hz resonant peak
  • Kozakai
    • Trigger analysis with ER run for the part of the PEM
    • Offline detchar report for the part of the PEM
  • TTanaka(ICRR)
  • Fujikawa
    • Lock loss study2
    • fujimopy
  • TTanaka(Niigata)
    • Magnetic field from air cooler and compressor
    • Magnetic field injection to AS and REFL table
  • etc
    • Pick up the items for the concern about the power supply and cabling
    • Check the cabling between rack and rack
    • Rack layout (for example, the Type-B use same circuit, rack design was different)
    • Use company for the cable re-connection
    • Reduce the plastic circuits

KAGRA/Subgroups/PEM/Meeting/200107/Minute (last edited 2020-01-08 05:30:54 by TakaakiYokozawa)