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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 . * '''Purpose''' : To check the consistency in the klog information. * '''Status''' : Please check about Type-A and Type-Bp. ([[https://github.com/gw-vis/kagra-vis/issues/9|Issues list]])-> I will make a private meeting with Okutomi-san and Fuji-kun on Saturday to discuss these. ([[https://github.com/gw-vis/kagra-vis/issues/7|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 among 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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| == 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 ==== |
* 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 == * 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. |
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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. (Issues list)-> 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 among 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)