Abstract
The ATLAS Collaboration has started a vast programme of upgrades in the context of high-luminosity LHC (HL-LHC) foreseen in 2024. We present here one of the frontend readout options, an ASIC called FATALIC, proposed for the high-luminosity phase LHC upgrade of the ATLAS Tile Calorimeter. Based on a 130 nm CMOS technology, FATALIC performs the complete signal processing, including amplification, shaping and digitisation. We describe the full characterisation of FATALIC and also the Optimal Filtering signal reconstruction method adapted to fully exploit the FATALIC three-range layout. Additionally we present the resolution performance of the whole chain measured using the charge injection system designed for calibration. Finally we discuss the results of the signal reconstruction used on real data collected during a preliminary beam test at CERN.
Highlights
ATLAS [1] is one of two general-purpose experiments at the Large Hadron Collider (LHC) at CERN
The ATLAS Collaboration has started an extensive programme of high-luminosity LHC (HL-LHC) upgrades for every sub-detector, including Tile Calorimeter (TileCal)
It is one of the front-end readout options proposed for the upgrade of TileCal, based on a 130 nm CMOS technology and designed for the complete processing of the signal delivered by each Photomultiplier-Tube (PMT), including amplification, shaping and digitisation
Summary
ATLAS [1] is one of two general-purpose experiments at the Large Hadron Collider (LHC) at CERN. The Tile Calorimeter (TileCal) [2] is the hadronic calorimeter covering the central region of the ATLAS detector, as can be seen on Fig. 1. The ASIC described in this document, named Front-end ATlAs tiLe Integrated Circuit (FATALIC) [4], has been developed to fulfil the requirements of the HL-LHC upgrade. It is one of the front-end readout options proposed for the upgrade of TileCal, based on a 130 nm CMOS technology and designed for the complete processing of the signal delivered by each Photomultiplier-Tube (PMT), including amplification, shaping and digitisation.
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