iKAGRA VIS electronics review

2016/2/4 15:00 -

Participants: Takahashi, Aso, Mark, Shoda, Raffaele, Akutsu, Okutomi, Fujii, Sekiguchi

Minutes

• PR3 electronics diagram (Mark)

  • https://db.tt/vg6TQYYa

  • https://db.tt/xKopUuUz

• Discussion
  • We went through the cables for PR3.
    • Overview diagram was drawn on a white board (picture)
      • Blue double circles indicates cables to be replaced from the test hanging (because of wrong pin-out).
      • Red check marks mean we checked the corresponding cable

    • Missing parts -> nothing

    • Connection between an LVDT driver and an ADC required a gender changer. Against the general policy of KAGRA electronics, the output connector of the LVDT driver is male (output should be female in the policy). Therefore, a gender changer was necessary. We should add a gender changer at the output of the LVDT driver.
    • Picomotor cabling was done differently from Mark's diagram
      • We will keep the wiring as is for iKAGRA
      • Make a new DCC document for iKAGRA PR3 cable diagram.
      • Make a modification in this new document. Put a note that the wiring is different in bKAGRA.
    • Stepper motor: TMCM box design will be circulated to VIS and AEL by Shoda by the end of Feb.
  • Future improvement
    • We need an overview schematic like the one drawn in the meeting with links to more detailed documents.
    • From the schematic, we should generate a table of necessary cables
    • We should use this table to check if we have all the necessary cables