= Agenda/Minutes of the VIS Meeting on 2020/1/17 =
2020/1/17 14:00 - 15:00

[[https://zoom.us/j/203743987|Zoom Meeting]]

Participants: Aso, Fabian, Sato, Takahashi, Hirata, Ishizaki, Tanaka, Okutomi, Shoda, Akutus

[[https://paper.dropbox.com/doc/VIS-Commissioning-Task-List--AlK26n6oP8QHU_XUQriwv2PvAg-RKcNXfMFrqOtTAPU48qQf|VIS Commissioning Task List]]

[[https://onedrive.live.com/view.aspx?resid=8E8081C20FE5EC3A!2278&ithint=file,xlsx&authkey=!AMFNtNa-Y6CVp94|Post-O3 task list]]

[[https://www.dropbox.com/s/e0inlp006spuj4m/Schedule%20after%20O3.pdf?dl=0|Schedule afetr O3]]

[[https://www.dropbox.com/s/9l1h0fw9kc1pzmm/Proocurement%202019FY.xlsx?dl=0|Procurement list in 2019FY]]

== Progress report ==
=== Type-A ===
==== Past week report ====
 * 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

==== 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.) [[https://www.dropbox.com/sh/1b8a0z4pn3d6b3g/AACopJmyfV0I2t44Ak9GIn4Ja?dl=0|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 ====
 * Sent the WD units for BS and PR2.
 * It is necessary to prepare for software of WD.

==== Plan for coming weeks ====
=== Other site works ===
=== Safety ===
 * Incidents:

== Discussion ==
LVDT sensitivity improvement using a 2nd readout channel. See [[https://www.dropbox.com/s/jywcdyxwrq084b3/LVDT_possible_modification.pdf?dl=0|these slides]].

== Travel Plans ==
 * Travel (Week of 1/20):
  * Takahashi:
  * Sato:
  * Hirata:
  * Shoda:
  * Fujii:
  * Tanaka:

 * Travel (Week of 1/27):
  * Takahashi:
  * Sato:
  * Hirata:
  * Shoda:
  * Fujii:
  * Tanaka:

== Next meeting ==
On 2020/1/24(Fri)