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Phase-1 with new JEP

Phase-1 with new JEP. Uli Schäfer Johannes Gutenberg- Universität Mainz. New Jet/Energy processor. JEP will be of very old age by time of phase-1 upgrade Limited availability of spares FPGAs not supported by current design tools LArg signals will be available optically at high granularity

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Phase-1 with new JEP

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  1. Phase-1 with new JEP UliSchäfer Johannes Gutenberg-Universität Mainz

  2. New Jet/Energy processor • JEP will be of very old age by time of phase-1 upgrade • Limited availability of spares • FPGAs not supported by current design tools • LArgsignals will be available optically at high granularity • Tile optical signals might become available at a later stage JEP comprised of JEMs, based on modular concept (mezzanines) • Staged upgrade of JEP, so as to guarantee smooth changeover. Minimal approach: • Increase JEM optical output capacity by renewal of low-cost daughter modules • Add nJEP processor next to topology processor module, to receive JEM optical real-time output • Keep JEP running while nJEP being commissioned… • Eventually switch to nJEP based jet trigger • Use old JEMs for e/o conversion of tile signals only • Replace JEMs with simple and cheap converter modules as further spares are required • Consider feeding nJEP directly from PPr • In case we were running into a latency crisis, full JEP replacement by o/e converter modules would be effective and affordable

  3. Phase-1 upgrade with new JEP nJEP Jul 27, nJEP tile

  4. nJEP : towards phase-2 • Minimal approach is basically replacement of aging JEP • nJEP to provide plenty of spare input capacity • Improve algorithms by making use of granularity available from DPP • Add higher granularity optical input from tile as it becomes available • nJEP to be built phase-2 compliant

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