= Agenda/Minutes of the VIS Meeting on 2019/11/8 =
2019/11/8 14:00 - 16:00

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

Participants: Takahashi, Fujii, Hirata, Tanaka, Sato, Ishizaki, Aso, Terrence, Lucia, Okutomi, Fabian

[[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]]

== Progress report ==
=== Type-A ===
==== Past week report ====
 * Recovery of GAS filter drift due to the temperature change. The heater control of chambers is planed.
 * Recovery of thermometer for the BF.
==== Plan for coming weeks ====
 * [[https://www.dropbox.com/s/9l1h0fw9kc1pzmm/Proocurement%202019FY.xlsx?dl=0|Procurement list in 2019FY]]

=== Type B ===
==== Past week report ====
The temperature has drifted in the BS clean booth. It has changed 0.8 degrees since October 10th. The top filter DC control signal is abovr 23,000 counts. See klog entry [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=11423|11423]].

==== Plan for coming weeks ====
The interferometer is the priority but we should continue with offline work:

 * Define new Guardian states for calm-down and obervation phases.
 * For the GAS filters DC control we still need to roll-off the filters at high frequencies in order to achive a suitable noise floor.

=== Type-Bp ===
==== Past week report ====
Fabian changed the orientation of the mirror in misaligned state again. The beam wasn't really going into the beam dump according to Kokeyama-san. After the change it's very close to where it was before. See klog entry [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=11377|11377]].

==== Plan for coming weeks ====
=== OMMT & OSTM (Takahashi) ===
==== Past week report ====
 * Finished the assembly of OSTM suspension with the dummy mirror.
 * Measured spectrum and transfer functions using the OSEMs.

==== Plan for coming weeks ====
=== VIS electronics ===
==== Past week report ====
==== Plan for coming weeks ====
=== Other site works ===
=== Safety ===
 * Incidents:

== Discussion ==
 * Status of GAS filter modification.
  * [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/DocDB/ShowDocument?docid=10148|Memo to consider 40kg TM suspensions]]
  * [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=10869|Finite Element Analysis of pierced type GAS filter]]

== Travel Plans ==
 * Travel (Week of 11/11):
  * Takahashi:
  * Sato: 14,15(Kashiwa)
  * Hirata:
  * Shoda:
  * Fujii:
  * Tanaka:

 * Travel (Week of 11/18):
  * Takahashi:
  * Sato:
  * Hirata:
  * Shoda:
  * Fujii:
  * Tanaka:

== Next meeting ==
On 2019/11/15(Fri)