= Agenda/Minutes of the VIS Meeting on 2019/10/25 =
2019/10/25 14:00 -

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

Participants:

[[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 ====
==== Plan for coming weeks ====
=== Type B ===
==== Past week report ====
I diagonalized the ASC degrees of freedom of the beam splitter using the oplev as a first approximation (klog entry [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=11165|11165]]). When the wafefront sensor becomes available we will do it again.

 * Only low frequencies were considered. Actually I used DC offsets.
 * After the correction, between angular degrees of freedom we achieved 2% coupling when checking with offsets and there was no coherence with length when briefly checking with transfer functions.
 * Because the coherence decreased at low frequecies after the correction if we want to further reduce the coupling at low frequencies we need to actuate with a line rather than with white noise.
 * It's still necessary to measure the whole set of crossed transfer functions.

==== Plan for coming weeks ====
 * As pointed out above, measure crossed transfer function in the BS.
 * Do the same with SR suspensions beginning with SRM.

=== Type-Bp ===
==== Past week report ====
==== Plan for coming weeks ====
=== OMMT & OSTM (Takahashi) ===
==== Past week report ====
 * Assembled the new OSTM suspension using the dummy mirror. At the first time, suspension length was too long by 1cm. It was corrected.

==== Plan for coming weeks ====
 * Test of the OSTM suspension is planed in the week of 11/4.

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

== Discussion ==
== Travel Plans ==
 * Travel (Week of 10/28):
  * Takahashi:
  * Sato:
  * Hirata:
  * Shoda:
  * Fujii:
  * Tanaka:

 * Travel (Week of 11/4):
  * Takahashi: 5-7
  * Sato: 5-7
  * Hirata:
  * Shoda:
  * Fujii:
  * Tanaka:

== Next meeting ==
On 2019/11/1(Fri)