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2019/5/31 13:30 - 		2019/5/31 13:30 - 14:30
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Participants: Participants: Takahashi, Shoda, Hirata, Aso, Tanaka, Ishizaki, Sato, Fujii, Terrence
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[Okutomi, Fujii, Yamada]

 * Measured the transfer functions of payloads by the oplevs.
 * Implemented the oplev servo block to the payload models.
 * Updated all the real-time models.　(The moderate WD system is implemented.)
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 * Preparation for the ER on 8th.
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==== Past week report ==== ==== Report for the week 5/27 (written by Fabian) ====
 * Shoda-san implemented the moderate watchdog: when tripping the amount of actuation will ramp down to zero smoothly. Klog entry [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=9009|9009]].
 * Terrence updated the BS guardian.
 * Terrence designed a VIS status monitor. The font might be too small for some people.
 * Terrence worked on SRM inertial damping.
  * There is coherence between the geophones and LVDTs at 0.1 Hz.
  * He designed a filter with a blending frequency of 0.110 Hz.
  * The system seems stable.
 * For SR2 Fabian calculated the sensor noise fed back into the system by the control loop: entry [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=8979|8979]].
  * The GAS filters' contrbution is too high.
  * I asked Enzo and he didn't rolled off the filters at higher frequecies.
  * Filter modification was assigned to Fabian.
 * Fabian and Yokozawa-san measured the settings of the SR3 LVDT driver. Klog entry [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=9025|9025]].
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 * Terrence will work in the inertial damping.
 * In the weekly comissioning meeting Fabian made the commitment of writing a list of the measurements we want to do with the DRMI for Type B characterization.I will write it by next week and send it around for comnents.
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=== OMMT & OSTM (Takahashi) ===
==== Past week report ====
[Sato]
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=== OMMT & OSTM ===
==== Past week report ====		  * Started the design of OSTM suspension.
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 * Taking out the MC-suspension from TAMA.
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 * Incidents:  * Incidents: no incident
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  * Type-A:
  * Type-B:		   * Type-A: no
  * Type-B: no
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   * We will not attempt to repair this before O4
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  * How to fix Type-B FRs ?    * We will inspect the BF pico first.
   * Depending on the cause of the trouble, we try to fix it.
  * Type-Bp magnet polarization problems (PRM IM and PR2 TM)
   * Estimate magnetic noise coupling first.
   * If the estimated noise is too large, we will attempt to fix the problem.
  * How to fix the Type-B FR problems ?
   * Can we fix the problem by re-adjusting the ballast masses ?
   * Check the details of the problem with Mark and Fabian.
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  * Takahashi: 
  * Sato: 
  * Mark: 
  * Hirata: 		   * Takahashi:
  * Sato:
  * Mark:
  * Hirata:
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  * Fujii:   * Fujii: 3-7
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  * Takahashi: 
  * Sato: 
  * Mark: 
  * Hirata: 		   * Takahashi:
  * Sato:
  * Mark:
  * Hirata:
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  * Fujii:   * Fujii: 10-14

Agenda/Minutes of the VIS Meeting on 2019/5/31

2019/5/31 13:30 - 14:30

Zoom Meeting

Participants: Takahashi, Shoda, Hirata, Aso, Tanaka, Ishizaki, Sato, Fujii, Terrence

Progress report

Schedule

Site work schedule: [[|XLSX]]

Type-A (Takahashi)

Past week report

[Okutomi, Fujii, Yamada]

  • Measured the transfer functions of payloads by the oplevs.
  • Implemented the oplev servo block to the payload models.
  • Updated all the real-time models.　(The moderate WD system is implemented.)

Plan for coming weeks

  • Preparation for the ER on 8th.

Type B (Mark)

Report for the week 5/27 (written by Fabian)

  • Shoda-san implemented the moderate watchdog: when tripping the amount of actuation will ramp down to zero smoothly. Klog entry 9009.

  • Terrence updated the BS guardian.
  • Terrence designed a VIS status monitor. The font might be too small for some people.
  • Terrence worked on SRM inertial damping.
    • There is coherence between the geophones and LVDTs at 0.1 Hz.
    • He designed a filter with a blending frequency of 0.110 Hz.
    • The system seems stable.

  • For SR2 Fabian calculated the sensor noise fed back into the system by the control loop: entry 8979.

    • The GAS filters' contrbution is too high.
    • I asked Enzo and he didn't rolled off the filters at higher frequecies.
    • Filter modification was assigned to Fabian.

  • Fabian and Yokozawa-san measured the settings of the SR3 LVDT driver. Klog entry 9025.

Plan for coming weeks

  • Terrence will work in the inertial damping.
  • In the weekly comissioning meeting Fabian made the commitment of writing a list of the measurements we want to do with the DRMI for Type B characterization.I will write it by next week and send it around for comnents.

Type-Bp (Shoda)

Past week report

Plan for coming weeks

OMMT & OSTM (Takahashi)

Past week report

[Sato]

  • Started the design of OSTM suspension.

Plan for coming weeks

  • Taking out the MC-suspension from TAMA.

VIS electronics (Tanaka)

Past week report

Plan for coming weeks

Other site works

Safety

  • Incidents: no incident
  • Foreseen risks
    • Type-A: no
    • Type-B: no

Discussion

  • Mechanical repair necessary after O3
    • Do we need to repair the ETMX F2 ?
      • We will not attempt to repair this before O4
    • Can we repair the ITMY BF Yaw pico ?
      • We will inspect the BF pico first.
      • Depending on the cause of the trouble, we try to fix it.
    • Type-Bp magnet polarization problems (PRM IM and PR2 TM)
      • Estimate magnetic noise coupling first.
      • If the estimated noise is too large, we will attempt to fix the problem.
    • How to fix the Type-B FR problems ?
      • Can we fix the problem by re-adjusting the ballast masses ?
      • Check the details of the problem with Mark and Fabian.

Travel Plans

  • Travel (Week of 6/3):
    • Takahashi:
    • Sato:
    • Mark:
    • Hirata:
    • Shoda:
    • Fujii: 3-7
    • Tanioka:
    • Tanaka:
    • Terrence:
  • Travel (Week of 6/10):
    • Takahashi:
    • Sato:
    • Mark:
    • Hirata:
    • Shoda:
    • Fujii: 10-14
    • Tanioka:
    • Tanaka:
    • Terrence:

Next meeting

On 2019/6/7(Fri)

KAGRA/Subgroups/VIS/VISMinutes20190531 (last edited 2019-05-31 14:57:25 by YoichiAso)