= Agenda/Minutes of the VIS Meeting on 2019/9/13 =
2019/9/13 14:00 -

[[https://zoom.us/j/203743987|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 [[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]]).

==== 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: 14 or 15 - 30
  * Tanaka:
  * Fabian: JPS
  * Okutomi: JPS

 * Travel (Week of 9/23):
  * Takahashi:
  * Sato:
  * Hirata:
  * Shoda: Vacation: 9/26 - 10/1
  * Fujii:
  * Tanaka:

== Next meeting ==
On 2019/9/20(Fri)