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SUMMARY:Next generation FPGA application on the ATLAS calorimeter trigger 
 board dedicated to jet identification
DTSTART;VALUE=DATE-TIME:20170228T100000Z
DTEND;VALUE=DATE-TIME:20170228T110000Z
DTSTAMP;VALUE=DATE-TIME:20260717T174223Z
UID:indico-contribution-1691@indico.inp.nsk.su
DESCRIPTION:Speakers: Stefan Rave (Insitut fuer Physik\, JGU Mainz)\nTo co
 pe with the enhanced luminosity delivered by the Large Hadron Collider (LH
 C) in 2021\, the ATLAS\nexperiment has planned a major upgrade. As part of
  this\, the first level trigger based on calorimeter data\nwill be upgrade
 d to exploit fine-granularity readout using a new system of Feature EXtrac
 tors (FEXs)\,\nwhich each use different physics objects for the trigger se
 lection. The three FEXs are: the\nelectromagnetic FEX (eFEX)\, the jet FEX
  (jFEX) and the global FEX (gFEX) that identify electron/photon\nand tau s
 ignatures\, (large area) jets and global variables\, respectively. The mai
 n difference between the\njFEX and the gFEX is the granularity of the data
  received from the calorimeters.\nThis presentation describes the general 
 upgrade concept of the first level calorimeter trigger and\nfocusses then 
 on the design and tests of the jFEX prototype. Up to 2 Tb/s have to be pro
 cessed to\nprovide jet identification (including large area jets) and meas
 urements of global variables within a few\nhundred nanoseconds latency bud
 get. This requires the use of large Field Programmable Gate Arrays\n(FPGAs
 ) with the largest number of Multi Gigabit Transceivers (MGTs) available o
 n the market. The jFEX\nboard prototype hosts four large FPGAs from the Xi
 linx Ultrascale family with 120 MGTs each\, connected\nto 24 opto-electric
 al devices\, resulting in a densely populated high speed signal board. MEG
 TRON6 was\nchosen as the material for the 24 layers jFEX board stack-up be
 cause of its property of low transmission\nloss with high frequency signal
 s (GHz range) and to further preserve the signal integrity. Special care h
 as\nbeen put into the design accompanied by simulation to optimise the vol
 tage drop and minimise the\ncurrent density over the power planes.\nThe fi
 rst results from numerous tests on the prototype are reported with special
  emphasis on high-\nspeed signal quality.\n\nhttps://indico.inp.nsk.su/eve
 nt/8/contributions/1691/
LOCATION:Budker Institute of Nuclear Physics
URL:https://indico.inp.nsk.su/event/8/contributions/1691/
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