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⇤ ← Revision 1 as of 2020-04-16 09:09:23 →
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Editor: RyutaroTakahashi
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2020/4/17 14:00 -  2020/4/17 14:00 -
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Participants:  Participants:
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[[https://onedrive.live.com/view.aspx?resid=8E8081C20FE5EC3A!2278&ithint=file,xlsx&authkey=!AMFNtNa-Y6CVp94|Post-O3 task list]] [[https://onedrive.live.com/view.aspx?resid=8E8081C20FE5EC3A!2278&ithint=file,xlsx&authkey=!AMFNtNa-Y6CVp94|Task list towards O4]]
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[[https://paper.dropbox.com/doc/Plan-for-the-long-OR-brake--AxxlJFvK1IGJjqrG5nfdHfGXAQ-KqexeqMaCA7DITFGxA5ih|Plan for the long OR brake]] == Progress report ==
=== General ===
(Miyo) I'm gathering information about the hardware part. (e.g. cabling, calibration of sensors and actuators.)
 * [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=11597|JGW-T2011597]] Calibration factors of LVDTs .
  * Please check about Type-A and Type-Bp. (Type-B is OK. Thank you fabian! :) )
 * [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=11573|JGW-D2011573]] Cabling diagram which includes connections between AEL circuits and pin assignment at the feed-through.
  * Need information about the pin assignment for all suspensions -> Sato-san? and Shoda-san?
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== Progress report ==
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==== Past week report ====
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==== Plan for coming weeks ====
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==== Past week report ====
==== Plan for coming weeks ====		  * For a summary of the current status of inertial damping in Type-B suspensions see the appendix (p14 onwards) in this [[https://1drv.ms/b/s!AoQaV1tdsEcUgc5MtkkqJv5fcCYBrw?e=TXSzu0|presentation]] shown the Commissioning Meeting on the 27th of September 2019.
 * In the context of writing a paper I gathered information about OSEMs and LVDTs and uploaded a document at : [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=11612|JGW-T2011612]], which I will be updating.Currently the content is
  * Linear ranges of 24 OSEMs and
  * Sensitivity of the six SRM OSEMS.
 * I gave feedback to Miyo-kun about LVDTs: all the current calibration factors in medm screens are consistent with klog reports. Just as a reminder:
  * The polarity of LVDTs is set in hardware: increase in LVDT output always means upwards motion or positive yaw in the IPs. Therefore, calibration factors in medm screens should always be positive.
  * An exception seems to be BS IP H2 LVDT, whose medm screen I have to check for a minus sign somewhere.
  * The offsets in medm screens correspond to the nominal places of keystones per the 3D-CAD, not the mid-point of the linear range.
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==== Past week report ====
==== Plan for coming weeks ====
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==== Past week report ====
==== Plan for coming weeks ====
=== VIS electronics ===
==== Past week report ====
==== Plan for coming weeks ====		 === Electronics ===
== Post O3 (4/21~) ==
 * [[https://docs.google.com/spreadsheets/d/1w4q8OvX9E6nkYSgshLYLoZH5yvQXHvGmL1agux8ztx0/edit?usp=sharing|Request]]
 * Papers (Type-B: Fabian, Type-A: Lucia?)
 * Operation mode at the shutdown of KAGRA

== Towards O3c ==
 * [[https://paper.dropbox.com/doc/Plan-for-the-long-OR-brake--AxxlJFvK1IGJjqrG5nfdHfGXAQ-KqexeqMaCA7DITFGxA5ih|Plan]]

== Controls ==
 * Had a VIS control strategy meeting [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=11557|documents]]
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 * Papaers
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Agenda/Minutes of the VIS Meeting on 2020/4/17

2020/4/17 14:00 -

Zoom Meeting

Participants:

VIS Commissioning Task List

Task list towards O4

Schedule afetr O3

Progress report

General

(Miyo) I'm gathering information about the hardware part. (e.g. cabling, calibration of sensors and actuators.)

  • JGW-T2011597 Calibration factors of LVDTs .

    • Please check about Type-A and Type-Bp. (Type-B is OK. Thank you fabian! :) )

  • JGW-D2011573 Cabling diagram which includes connections between AEL circuits and pin assignment at the feed-through.

    • Need information about the pin assignment for all suspensions -> Sato-san? and Shoda-san?

Type-A

Type B

  • For a summary of the current status of inertial damping in Type-B suspensions see the appendix (p14 onwards) in this presentation shown the Commissioning Meeting on the 27th of September 2019.

  • In the context of writing a paper I gathered information about OSEMs and LVDTs and uploaded a document at : JGW-T2011612, which I will be updating.Currently the content is

    • Linear ranges of 24 OSEMs and
    • Sensitivity of the six SRM OSEMS.
  • I gave feedback to Miyo-kun about LVDTs: all the current calibration factors in medm screens are consistent with klog reports. Just as a reminder:
    • The polarity of LVDTs is set in hardware: increase in LVDT output always means upwards motion or positive yaw in the IPs. Therefore, calibration factors in medm screens should always be positive.
    • An exception seems to be BS IP H2 LVDT, whose medm screen I have to check for a minus sign somewhere.
    • The offsets in medm screens correspond to the nominal places of keystones per the 3D-CAD, not the mid-point of the linear range.

Type-Bp

Type-C

Electronics

Post O3 (4/21~)

  • Request

  • Papers (Type-B: Fabian, Type-A: Lucia?)
  • Operation mode at the shutdown of KAGRA

Towards O3c

Controls

  • Had a VIS control strategy meeting documents

Safety

Discussion

Travel Plans

Next meeting

On 2020/4/24(Fri)

KAGRA/Subgroups/VIS/VISMinutes20200417 (last edited 2020-04-18 10:45:23 by RyutaroTakahashi)