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Agenda/Minutes of the VIS Meeting on 2020/4/17
2020/4/17 14:00 -
Participants:
Progress report
General
Miyo-kun gathered information about LVDTs at JGW-T2011597. Feedback seems to be required.
Type-A
Revising the Type-A installation procedure.
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~)
- 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)