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* [[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? |
* [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=11597|JGW-T2011597]] Calibration factors of LVDTs . * ***Purpose*** : To check the consistency in the klog information. * ***Status*** : Please check about Type-A and Type-Bp. -> I will make a private meeting with Okutomi-san and Fuji-kun on Saturday to discuss these. (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. * ***Purpose*** : To make a consensus about the cabling with AEL and CRYO group for O4. * ***Status*** Need information about the pin assignment for all suspensions -> Sato-san? and Shoda-san? |
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| * Had a VIS control strategy meeting [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=11557|documents]] |
Agenda/Minutes of the VIS Meeting on 2020/4/17
2020/4/17 14:00 -
Participants:
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 .
- ***Purpose*** : To check the consistency in the klog information.
***Status*** : Please check about Type-A and Type-Bp. -> I will make a private meeting with Okutomi-san and Fuji-kun on Saturday to discuss these. (Type-B is OK. Thank you fabian!
)
JGW-D2011573 Cabling diagram which includes connections between AEL circuits and pin assignment at the feed-through.
- ***Purpose*** : To make a consensus about the cabling with AEL and CRYO group for O4.
***Status*** Need information about the pin assignment for all suspensions -> Sato-san? and Shoda-san?
Type-A
Revising the Type-A installation procedure.
Type B
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~)
- Papers (Type-B: Fabian, Type-A: Lucia?)
- Operation mode at the shutdown of KAGRA
Towards O3c
Controls
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.
Safety
Discussion
Travel Plans
Next meeting
On 2020/4/24(Fri)