= Agenda/Minutes of the VIS Meeting on 2019/4/12 =

2019/4/12 13:30 - 14:17

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

Participants:

== Progress report ==
=== Schedule Chart ===
Site work schedule: [[|XLSX]]

Type-A  : ([[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=7320|PDF/MPP]])

Type-B: ([[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=7779|PDF/MPP]])

Type-C: ([[ https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=9013|XLSX]])

=== Type-A (Takahashi) ===
==== Past week report ====
 * Monitoring of IXV and EYV during the cool-down.
 * Healthy check of EXV after the CRY work. 

==== Plan for coming weeks ====
 * Investigation of ACCs in Y-front (4/24-25?).

=== Type B (Mark) ===
==== Report for the week of 4/8 ====
 *  Mark made lots of Guardian improvements:
  * Used Guardian's timer functionality to drastically reduce the number of notifications during ramping.
  * Added new requestable states DCCTRL_ONLY and NEUTRAL (and associated transitional states) to facilitate testing.
  * Tidied up the code to use tabs consistently throughout for indentation.
  * Disabled the test for the IM-H coil driver WD (to work around the fact that only the relay in the chassis has been disabled, not the WD signals going to the BIO).
 * We opened the BS tank lid and offloaded a large IM-Y offset to F0-Y with manual adjustment of the broken yaw mechanism.
 * We opened the SR2 side doors and adjusted the V1 OSEM to mid-range.
 * Mark offloaded a large SR2 IM-Y offset to F0-Y.
 * Mark did health checks for BS, SR2 and SR3.
 * Fabian offloaded yaw from SRM and did the SRM health check.
 * Fabian updated the Python code for the stepper driver MEDM screen to reflect that two stepper drivers have different mappings to work around dead channels.
 * Fabian monitored pumpdown on Friday afternoon and will continue on Saturday.

==== Plan for week of 4/15 ====
 * Mark, Hirata-san at Kamioka Tue-Thu.
 * Fabian at Kamioka Mon-Wed (Thu at Niigata).
 * All at f2f Meeting 4/19-21.
 * Post-pumpdown health checks.
 * Teach Hirata-san about the computer systems and control theory.
 * Work with Lucia to do blending of the IP LVDTs and geophones.
 * More Guardian improvements.
  * Update vistools.py (formerly LIGO sustools.py) for Type B and KAGRA, and have the TYPEB.py Guardian use it where appropriate.
  * Modify RT models and/or Guardian to revert to the SAFE state under control in all but the most extreme emergency situations (rather than suddenly shutting off all output).
 * Work on Type B paper.
 * Tidy up.
  * Gather and clean tools.
  * Gather and organize unused parts and fasteners.

==== Vacation/Travel Info ====
 * Mark at Mitaka 4/15.
 * f2f 4/19 (Friday), 4/20, 4/21.
 * Terrence's next visit from 4/18.
 * Fabian's vacation 4/26 to 5/10.
 * Mark's US vacation from 5/22 to 6/11.
 * Mark's final day 6/28.

=== Type-Bp (Shoda) ===
==== Past week report ====
 '''PRM'''
 * IM-OSEM (V1 and V3 ?) was centerized.
 * Health check was done and it was confirmed that PRM looked healthy in terms of the transfer functions.

 '''PR2'''
 * IM-OSEM (V1 and V3 ) was centerized.
 * Health check was done and was it confirmed that PR2 looked healthy in terms of the transfer functions?
 * '''!Important note!''' The polarities of the newly-glued magnet was wrong. We have to keep in mind and later have to think how to fix this issue.

 '''PR3'''
 * IM-OSEM V1, V2, V3 went off from the center but still in the linear range.
 * Was the health check done completely? and was it confirmed that PR3 looked healthy in terms of the transfer functions? (the bad width was a bit large, like 0.03 Hz though, personally it looked okay..)


==== Plan for coming weeks ====
 * change the LVDT board for BF-LVDT-V of PR2

=== OMMT & OSTM (Ohishi) ===
==== Past week report ====
==== Plan for coming weeks ====

=== VIS electronics (Tanaka) ===
==== Past week report ====
==== Plan for coming weeks ====

=== Other site works ===

=== Safety ===
 * Incidents: no incident

 * Foreseen risks
  * Type-A: 
  * Type-B:

== Discussion ==
 * F2F talk slots

== Travel Plans ==
 * Travel (Week of 4/15):
  * Takahashi: 
  * Sato: 
  * Mark: 16-18
  * Hirata: 16-18
  * Shoda:
  * Fujii: --(16-18)-- 17-18
  * Tanioka:
  * Tanaka:
  * Terrence: 

 * Travel (Week of 4/22):
  * Takahashi: 24-25 
  * Sato: 
  * Mark: 22-26
  * Hirata: 
  * Shoda:
  * Fujii: 23-26
  * Tanioka:
  * Tanaka:
  * Terrence:

== Next meeting ==
On 2019/4/26(Fri)