Differences between revisions 1 and 13 (spanning 12 versions)
⇤ ← Revision 1 as of 2020-01-15 16:23:27 →
Size: 1405
Editor: RyutaroTakahashi
Comment:
← Revision 13 as of 2020-01-17 14:23:03 → ⇥
Size: 3127
Editor: naohisa.sato
Comment:
Deletions are marked like this. Additions are marked like this.
Line 2: Line 2:
2020/1/17 14:00 -  2020/1/17 14:00 -
Line 6: Line 6:
Participants:  Participants:
Line 17: Line 17:
Line 20: Line 19:
 * Photo-sensor decoupling ([[http://klog.icrr.u-tokyo.ac.jp/osl/?r=12528|klog#12528]])
  * Decoupling: almost done
   * The original geometrical sensing matrix was completely useless.
  * Todos: Loop gain tuning
  * Nakano-san and Yamada-kun contributed a lot to it.
 * 7.5 Hz double peak problem ([[http://klog.icrr.u-tokyo.ac.jp/osl/?r=12473|klog#12473]], [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=12516|klog#12516]])
  * Only ETMY has double peaks around 7.5 Hz in TM pitch.
  * It's not critical to the PRFPMI commissioning so far, but looks annoying as reported by Nakano-san.
 * GAS control status: No saturation at present
Line 23: Line 32:
 * Okutomi-san and Yamamoto-kun modified the SRM payload sampling rate (from 4 kHz to 16 kHz) in order to make it compatible with the main interferometer control scheme.
 * Tomura-san disabled all the SRM coil drivers hardware watchdogs.
 * Fabian worked in the design of oplev cases. Akutsu-san provided useful information and more information is expected from the cryopayload group.
Line 24: Line 37:
 * Tomura-san will likely modify the other SR coild drivers.
 * Fabian needs to finish surveying the SR2 cleanbooth in ordet to decide where the asembly frame will be.
 * Fabian will continue with the oplev cover design.
Line 26: Line 43:
 * PR3 tripped again. V1 comes back a little bit, but it does not seem to be enough.
  * Better values for RT watchdog? (Maybe in the future, or other suspensions.) [[https://www.dropbox.com/sh/1b8a0z4pn3d6b3g/AACopJmyfV0I2t44Ak9GIn4Ja?dl=0|RMS values]]
Line 29: Line 49:
 * Installed the OSTM suspension into the OMC chamber.
Line 38: Line 60:


LVDT sensitivity improvement using a 2nd readout channel. See [[https://www.dropbox.com/s/jywcdyxwrq084b3/LVDT_possible_modification.pdf?dl=0|these slides]].
Line 45: Line 65:
  * Sato: -21   * Sato: -19
Line 51: Line 71:
 * Travel (Week of 1/20):  * Travel (Week of 1/27):

Agenda/Minutes of the VIS Meeting on 2020/1/17

2020/1/17 14:00 -

Zoom Meeting

Participants:

VIS Commissioning Task List

Post-O3 task list

Schedule afetr O3

Procurement list in 2019FY

Progress report

Type-A

Past week report

  • Photo-sensor decoupling (klog#12528)

    • Decoupling: almost done
      • The original geometrical sensing matrix was completely useless.
    • Todos: Loop gain tuning
    • Nakano-san and Yamada-kun contributed a lot to it.

  • 7.5 Hz double peak problem (klog#12473, klog#12516)

    • Only ETMY has double peaks around 7.5 Hz in TM pitch.
    • It's not critical to the PRFPMI commissioning so far, but looks annoying as reported by Nakano-san.
  • GAS control status: No saturation at present

Plan for coming weeks

Type B

Past week report

  • Okutomi-san and Yamamoto-kun modified the SRM payload sampling rate (from 4 kHz to 16 kHz) in order to make it compatible with the main interferometer control scheme.
  • Tomura-san disabled all the SRM coil drivers hardware watchdogs.
  • Fabian worked in the design of oplev cases. Akutsu-san provided useful information and more information is expected from the cryopayload group.

Plan for coming weeks

  • Tomura-san will likely modify the other SR coild drivers.
  • Fabian needs to finish surveying the SR2 cleanbooth in ordet to decide where the asembly frame will be.
  • Fabian will continue with the oplev cover design.

Type-Bp

Past week report

  • PR3 tripped again. V1 comes back a little bit, but it does not seem to be enough.

    • Better values for RT watchdog? (Maybe in the future, or other suspensions.) RMS values

Plan for coming weeks

OMMT & OSTM

Past week report

  • Installed the OSTM suspension into the OMC chamber.

Plan for coming weeks

VIS electronics

Past week report

Plan for coming weeks

Other site works

Safety

  • Incidents:

Discussion

LVDT sensitivity improvement using a 2nd readout channel. See these slides.

Travel Plans

  • Travel (Week of 1/20):
    • Takahashi:
    • Sato: -19
    • Hirata:
    • Shoda:
    • Fujii:
    • Tanaka:
  • Travel (Week of 1/27):
    • Takahashi:
    • Sato:
    • Hirata:
    • Shoda:
    • Fujii:
    • Tanaka:

Next meeting

On 2020/1/24(Fri)

KAGRA/Subgroups/VIS/VISMinutes20200117 (last edited 2020-01-17 15:32:09 by RyutaroTakahashi)