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    Developer's meeting

    → Europe/Zurich
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    testing progress (Enrico, Roland):

    • (showing some of the slides shown in Monday's ATLAS FELIX Developers' meeting)
    • EHN1: some issues on the FELIX side because of missing CRC at the end of a chunk causing an error flag to be raised (Dan will follow up)
    • spydaq on the second WIB link: data loooks fine (but not received correctly by FELIX)
    • also difference between data and test modes on second link
    • Dan: FELIX shoud now be working correctly at BU, will check. What to use? (Giovanna:) fedump, fdaq
    • Giovanna: would be good to find some extended amount of time between CERN and BU, to sort out remaining issues?

    Cosmic Ray Tagger (Giovanna):

    • (goes back to discussion > 10 months ago, at which point there were person-power issues)
    • now a group with some more person-power joined
    • apparently they feel that the CRT is a good occasion to test FELIX (potential interest in DUNE ND)
      • for FE, they intend to use the Kintex 707 dev board (also used as FELIX emulator in ATLAS)
    • for the CRT, the requirements appear to be modest: low data volume
      • a single link to a single FELIX system ought to suffice; it should then be possible to channel CRT data using a separate subscription to felixcore
    • Giovanna will have a more detailed discussion with them shortly, this should help to clarify the details

    hardware needs:

    • networking needed for the BNL711 card now installed at EHN1: compression not yet active/opportune so 100 Gb/s link seems desirable
      • restriction to 3m cable length if copper cables used
    • Nikhef OK with paying (and actually purchasing). Frank will take action
      • also look into price of active-optical cable (longer cables possible) and into compatibility with the Brocade icx7750 switch (but note that this can do 40 Gb/s only)

    AOB:

    • Enrico and Roland asked (by the FELIX developers) to serve as a first point of contact for technical FELIX questions
    • FELIX team should expect to be asked for a report on the implementation of the Overlay in the ProtoDUNE DAQ meeting on September 11 (RCE has been asked to report on September 4)

    Next meeting: September 13

    There are minutes attached to this event. Show them.
      • 18:00 → 18:20
        WIB / emulator test progress 20m
        Speakers: Daniel Edward Gastler (Boston University (US)), Daniel Edward Gastler (Boston University (US)), Enrico Gamberini (CERN), Roland Sipos (Institut of theoretical physics Eotvos Lorand University (HU))
      • 18:20 → 18:40
        Cosmic Ray Tagger 20m
        Speaker: Giovanna Lehmann Miotto (CERN)
      • 18:40 → 19:00
        Hardware needs 20m