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   * New assignment of IM OSEMs to DAQ channels (#4-9 are now V1, V2, V3, H1, H2, H3 rather than H1, H2, ...) from last Friday (the wiring was changed to reflect the model).    * New assignment of IM OSEMs to DAQ channels (#4-9 are now V1, V2, V3, H1, H2, H3 rather than H1, H2, ...) from last Friday (the wiring was changed to reflect the model so as to remain consistent with PRx).

Scraps of text for incorporation in the VIS Meeting Minutes

KAGRA/Subgroups/VIS/MeetingNAOJ

  • Type B Past Week Summary
    • Mark (with Enzo) did initial TFs on the BF.
      • Did fixed-sine TFs on individual OSEMs at low frequency to check actuator polarity (klog 2176 and 2182).

      • Set gains in the COILOUTF block to compensate for actuator polarity.
    • Mark (with Enzo) did a free-swing measurement on the BS after earthquake of 11/22 (klog 2182).

      • Results suspicious (noted by Shoda-san): too much difference between OSEMs - horizontal showing much less motion than vertical.
      • Possible rubbing in horizontal.
      • May need a trip to Kamioka.
    • Mark (with Enzo) made corrections and improvements to many of the MEDM screens (klog 2176 and 2182).

      • Main overview screen was not generic in many places, and links to GDS_TP screens were broken.
      • ADC monitor screen referenced bad channels with LIGO-style names.
      • DAC monitor screen was not generic and did not support IM OSEMs.
      • Watchdog IM OSEM AC band limit filter screen was a copy of the TM one.
      • Watchdog TM OSEM AC band limit filter screen appears to be getting OL signals as input - needs model changes to fix.
      • The zoomed screens for IM OSEM centering were called incorrectly and did not work.
      • Various screens had LIGO-style channel names as labels.
    • Mark did a draft of D1603600-v12, including:
      • New assignment of IM OSEMs to DAQ channels (#4-9 are now V1, V2, V3, H1, H2, H3 rather than H1, H2, ...) from last Friday (the wiring was changed to reflect the model so as to remain consistent with PRx).
      • Information on how to identify the wires from the steppers and LVDTs so that the adapter cables can be plugged in properly.
    • Mark worked on schedule.
    • Hirata-san did drawings for new 8-mm maraging wires for Type A.
    • Hirata-san worked on PR/SR mirror box modifications with Shoda-san.

KAGRA/Subgroups/VIS/TypeB/Minutes (last edited 2022-07-29 13:18:56 by fabian.arellano)