Abstract
This article gives an overview of the Phase-I Upgrade of the ATLAS LAr Calorimeter Trigger Readout. The design of custom developed hardware for fast real-time data processing and transfer are presented. Performance results from the prototype boards operated in the demonstrator system, first measurements of noise behavior and responses on the test pulses to the demonstrator system are shown.
Highlights
Phase I Upgrade of LAr Calorimeter ReadoutPurpose : providing higher-granularity, higher-resolution, and longitudinal shower information from the calorimeter to the Level-1 trigger processors
Real time processing done by ALTERA Arria-10
For testing the performance of the Super Cell, LAr Trigger Digitizer Board (LTDB) Demonstrator has been installed on the ATLAS detector (2014 Summer) installed in the barrel part (1.767 < φ < 2.160, 0 < η < 1.4)
Summary
Purpose : providing higher-granularity, higher-resolution, and longitudinal shower information from the calorimeter to the Level-1 trigger processors. Strategy : increasing granularity 10 times by changing from Trigger Tower to Super Cell readout (will be done during 2018). Trigger Tower : sums the energy deposition across the longitudinal layers of the calorimeters in an area of Δη × Δφ = 0.1 × 0.1. Super Cell : provides information for each calorimeter layer for the full η range of the calorimeter, and finer segmentation (Δη × Δφ = 0.025 × 0.1)
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