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=== Type B ===
==== Report for the week 13-09-2019 ====
 * In previous weeks we identified injected noise into the SR3 IM from the oplev (klog [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=10262|10262]]). On Monday I put notches at various frequencies where there were peaks (klog [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=10423|10423]]). This procedure seems to work but it's tedious and we should do it in an as-needed depending on the impact of each peak in the interferometer signal.
 * Shoda-san and Terrence began been working in IM-L to IM-P and IM-Y filters (klog [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=10505|10505]]).
 * In a previuos week I modified the SR2 real-time model in order to do LVDT correction with the seismometer signals. This week was mainly troubleshooting and preparation:
  * We found a couple of errors in the real-time model (klog [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=10460|10460]], [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=10509|10509]]).
  * Miyo-kun added ati-aliasing filter at the output of the PEM real-time model before the Dolphin network.
  * An integrator is needed for the seismometer signal in order to get a displacement. However, the automatically generated medm screen points to a different filter bank (klog [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=10510|10510]]). This hasn't been fixed yet.
  * Still, I measured transfer functions from seismometer on the ground to IP LVDT in FLOAT state, data which can be corrected (klog [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=10510|10510]]).
 * In SR2 the cables connecting the BIO output from the coil drivers to the DIO card inside the I/O chassis were connected in a wrong way. I fixed them (klog [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=10464|10464]] and [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=10508|10508]]).
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=== Type B ===
==== Past week report ====
==== Plan for coming weeks ====		 ==== Plan for coming week ====
 * Terrence and Shoda-san will work in IM-L to TM angular decoupling.
 * After decoupling IP LVDT sensor correction is the priority.
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  * Takahashi: 
  * Sato: 
  * Hirata: 		   * Takahashi:
  * Sato:
  * Hirata:
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  * Fujii:    * Fujii:
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  * Takahashi: 
  * Sato: 
  * Hirata: 		   * Takahashi:
  * Sato:
  * Hirata:
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  * Fujii:    * Fujii:

Agenda/Minutes of the VIS Meeting on 2019/9/13

2019/9/13 14:00 -

Zoom Meeting

Participants:

Progress report

Type-A

Past week report

Plan for coming weeks

Type B

Report for the week 13-09-2019

  • In previous weeks we identified injected noise into the SR3 IM from the oplev (klog 10262). On Monday I put notches at various frequencies where there were peaks (klog 10423). This procedure seems to work but it's tedious and we should do it in an as-needed depending on the impact of each peak in the interferometer signal.

  • Shoda-san and Terrence began been working in IM-L to IM-P and IM-Y filters (klog 10505).

  • In a previuos week I modified the SR2 real-time model in order to do LVDT correction with the seismometer signals. This week was mainly troubleshooting and preparation:

    • We found a couple of errors in the real-time model (klog 10460, 10509).

    • Miyo-kun added ati-aliasing filter at the output of the PEM real-time model before the Dolphin network.

    • An integrator is needed for the seismometer signal in order to get a displacement. However, the automatically generated medm screen points to a different filter bank (klog 10510). This hasn't been fixed yet.

    • Still, I measured transfer functions from seismometer on the ground to IP LVDT in FLOAT state, data which can be corrected (klog 10510).

  • In SR2 the cables connecting the BIO output from the coil drivers to the DIO card inside the I/O chassis were connected in a wrong way. I fixed them (klog 10464 and 10508).

Plan for coming week

  • Terrence and Shoda-san will work in IM-L to TM angular decoupling.
  • After decoupling IP LVDT sensor correction is the priority.

Type-Bp

Past week report

Plan for coming weeks

OMMT & OSTM (Takahashi)

Past week report

  • Evaluating the M2052 sample bar for OMC.

Plan for coming weeks

VIS electronics

Past week report

Plan for coming weeks

Other site works

Safety

  • Incidents:

Discussion

  • Continued discussion on the VIS repair/upgrade work between O3 and O4

Travel Plans

  • Travel (Week of 9/16):
    • Takahashi:
    • Sato:
    • Hirata:
    • Shoda:
    • Fujii:
    • Tanaka:
  • Travel (Week of 9/23):
    • Takahashi:
    • Sato:
    • Hirata:
    • Shoda:
    • Fujii:
    • Tanaka:

Next meeting

On 2019/9/13(Fri)

KAGRA/Subgroups/VIS/VISMinutes20190913 (last edited 2019-09-13 15:16:59 by YoichiAso)