gFEX, the ATLAS Calorimeter Global Feature Extractor for the Phase-I upgrade of the ATLAS experiment

Abstract

The Global Feature Extractor (gFEX) module is a planned component of the Level 1 online trigger system for the ATLAS experiment planned for installation during the Phase-I upgrade in 2018. This unique single electronics board with multiple high speed processors will receive coarsegranularity information from all the ATLAS calorimeters enabling the identification in real time of large-radius jets for capturing Lorentz-boosted objects such as top quarks, Higgs, and W /Z bosons. The gFEX architecture also facilitates the calculation of global event variables such as missing transverse energy, centrality for heavy ion collisions, and event-by-event pile-up energy density. Details of the electronics architecture that provides these capabilities are presented, along with results of tests of the prototype systems now available. The status of the firmware algorithm design and implementation as well as monitoring capabilities are also presented.

Disorder and mimesis at hadron colliders

“…Missing new physics because of our own choices in the selection of events would be a highly tragic mistake. An extensive effort in this direction is already in progress at the LHC, in the form of data parking and data scouting [5][6][7][8] and upgrades for the high-luminosity run, such as implementing particle flow at Level 1 [9,10] in CMS and the Feature Extractors [11,12] and Fast Track Trigger (FTK) [13] in ATLAS.…”