Abstract

The large hadron collider (LHC) will undergo a major upgrade starting in 2025 toward the high luminosity LHC (HL-LHC) to increase the instantaneous luminosity by a factor of 5 to 7 compared to the nominal value. The Phase-II Upgrade (2025-2027) will require the trigger and readout electronics of the ATLAS experiment to operate with the stringent conditions imposed by the HL-LHC. During this upgrade, both on- and off-detector readout electronics of TileCal will be completely replaced with a new data acquisition which will provide full-granularity information to the ATLAS trigger system. The compact processing modules (CPMs) are responsible for the LHC bunch-crossing clock distribution toward the detector, configuration of the on-detector electronics, data acquisition, cell energy reconstruction, and data transmission to the Trigger and Data AcQuisition interface (TDAQi) boards. This article introduces the design of the CPM for the ATLAS Tile Calorimeter Phase-II Upgrade and the results and experiences with the first prototypes.

Highlights

  • T HE ATLAS experiment [1] is one of the two general purpose particle detectors at the Large Hadron Collider (LHC) at CERN.The Tile Calorimeter (TileCal) [2] is the hadronic calorimeter of ATLAS covering the central region of the detector up to a pseudorapidity of η < |1.7|

  • This paper introduces the design of the Compact Processing Modules for the ATLAS Tile Calorimeter Phase-II Upgrade and the results and experiences with the first prototypes

  • The new readout electronics is designed to fulfill the radiation levels constraint under HLLHC conditions, as well as, the demanding processing capabilities and data throughputs required by the full-digital ATLAS Trigger and Data AcQuisition (TDAQ) system

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Summary

Carrioon behalf of the ATLAS Tile Calorimeter System

Abstract—The LHC will undergo a major upgrade starting in 2025 towards the High Luminosity LHC (HL-LHC) to increase the instantaneous luminosity by a factor of 5 to 7 compared to the nominal value. The Phase-II Upgrade (2025–2027) will require the trigger and readout electronics of the ATLAS experiment to operate with the stringent conditions imposed by the HL-LHC. During this upgrade, both on- and off-detector readout electronics of TileCal will be completely replaced with a new data acquisition which will provide full-granularity information to the ATLAS trigger system. The Compact Processing Modules are responsible for the LHC bunch-crossing clock distribution towards the detector, configuration of the on-detector electronics, data acquisition, cell energy reconstruction, and data transmission to the TDAQ interface (TDAQi).

INTRODUCTION
ATLAS PHASE-II UPGRADE
On-detector electronics
Off-detector electronics
Hardware design and connectivity
COMPACT PROCESSING MODULES
Clocking circuitry
PCB design
Link qualification tests
Signal integrity validation
Clock qualification tests
10 Hz–10 MHz
CONCLUSIONS AND FUTURE PLANS
Full Text
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