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Meeting Minutes

by Franco Carbognani — last modified 2013-06-03 11:10

27/05/2013 Cable Trays Meeting Minutes



Present

F. Carbognani (FCA), A. Bozzi, S. Cortese, L. Paoli (LPA), A. Paoli (APA), M. D’Andrea (MDA), H. Heitmann, P. Popolizio, F. Paoletti, F. Nocera (FNO)


1- An assessment of existing cable trays availability/reuse has been done. See dedicated meeting minutes:
https://workarea.ego-gw.it/ego2/virgo/advanced-virgo/ime/meetings/cabletrays-meeting-09-may-2013/meeting-minutes/

2- From this former meeting it is stressed again that, to prevent magnetic noise, it would be preferable to remove the AC cables now going trough the cable trays embedded in the CB hall floor and redeploy them farther from the towers.

3- The preferred use of closed trays respect to the mesh trays for the DC distribution is confirmed by FNO

4- For the INJ area:
  • The need for removal of existing network cables reaching the underground Clean Rooms is confirmed. Those cables should be labeled before removing.
  • Rack locations and cabling need to be reassessed because of the Virgo+ laser reuse at the beginning of AdV. This will be discussed with F. Cleva and L. Rolland and additional/different needs taken into account during Clean Room construction
5- For what concern the information needed by Computing to proceed with the backbone network upgrade Call for Tender, the alternative cable trays for the backbone fibers are almost already in place. Only the last section going around the INJ tower need still to be finalized and this information will be soon provided my MDA to Computing.

6- Main Actions:

  • Computing: the various building levels Passive network endpoints drawings will be enriched with the information regarding the foreseen numbers of cable/fibers considering a reasonable level of redundancy. They will pass them to FCA
  • FCA: will integrate on those drawing whatever information still missing available on the "Estimation of AdV racks needs and locations" document from Loic or any other relevant and information (DC lines from DAQ Room to INJ Elec. Lab., etc.).  Such drawings will become the primary source of specifications for the cable trays design. They will be circulated and discussed at a DIM meeting.
  • the drawings will be passed to:
    • LPA: for integration within the 3D Central Building Layout drawing
    • MDA and APA: for starting the design of the fiscal cable trays network