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).
    • 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.