Conveners
HL-LHC: HL-LHC
- Haleh Hadavand
HL-LHC: HL-LHC
- Ariel Schwartzman (SLAC)
HL-LHC: HL-LHC
- Jim Brau
HL-LHC: HL-LHC
- Chris Madrid
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Chiara Grieco (Univ. of California Santa Barbara (US))02/06/2026, 09:00Oral
The CMS Collaboration is preparing to build replacement endcap calorimeters for the High Luminosity LHC (HL-LHC) era. The new High-Granularity Calorimeter (HGCal) is a highly granular sampling calorimeter with approximately six million silicon channels and about four hundred thousand scintillator tile-readout with on-tile silicon multipliers. The calorimeter is designed to operate in the harsh...
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Devin Mahon (University of Minnesota)02/06/2026, 09:30Oral
As part of its HL-LHC upgrade program, the CMS experiment is developing a High Granularity Calorimeter (HGCAL) to replace the existing endcap calorimeters. The HGCAL will be realized as a sampling calorimeter equipped with modules of silicon or scintillator tiles read out by SiPMs. For the validation of the HGCAL, prototypes of silicon and SiPM-on-tile modules have been assembled into a...
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Trisha Debnath (LLR-Ecole Polytechnique | CNRS (FR))02/06/2026, 10:00Oral
The CMS collaboration has chosen a novel high granularity calorimeter (HGCAL) for the endcap regions as part of its planned upgrade for the high-luminosity phase of the LHC. The HGCAL will have fine segmentation in both the transverse and longitudinal directions, which leads to about six million readout channels in total. It will be part of the Level 1 (L1) trigger of the CMS experiment, and...
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Ruchi Chudasama (University of Alabama (US))02/06/2026, 11:00Oral
The CMS Collaboration is preparing to replace its current endcap calorimeters with the High Granularity Calorimeter (HGCAL) for the High Luminosity LHC (HL-LHC) era. HGCAL features unprecedented transverse and longitudinal granularity, enabling detailed measurement of shower development with 5D information. The detector employs silicon sensors in the electromagnetic section and high-radiation...
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Daniel Guerrero (Fermi National Accelerator Lab. (US))02/06/2026, 11:30Oral
In preparation for the High-Luminosity LHC, the CMS experiment is upgrading its endcap calorimeters with the High-Granularity Calorimeter (HGCal), a novel imaging calorimeter featuring fine spatial segmentation and precise timing. The detector integrates silicon sensors in high-radiation regions and plastic scintillator tiles with SiPM readout in low-radiation regions. The scintillator-based...
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Shamik Ghosh (LLR, École Polytechnique, IN2P3-CNRS)02/06/2026, 12:00Oral
The increase in luminosity and pileup at the High-Luminosity LHC (HL-LHC) will place unprecedented demands on the CMS experiment, requiring major advances in both detector technology and event reconstruction. Among the planned upgrades, the High-Granularity Calorimeter (HGCAL) will replace the current endcap calorimeters, providing fine spatial segmentation and precision timing. These features...
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Ruben Gargiulo02/06/2026, 14:00Oral
The High Luminosity upgrade of the CERN Large Hadron Collider aims to achieve unprecedented levels of instantaneous and integrated luminosities. 140 to 200 collisions per bunch crossing are anticipated, which will represent a severe challenge for the detectors. The endcap part of the Compact Muon Solenoid calorimeters will be replaced by a new detector. In the barrel, the lead tungstate...
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Sven Menke (Max-Planck-Institut für Physik)02/06/2026, 14:45Oral
The ATLAS Liquid Argon (LAr) calorimeter readout electronics will be fully
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upgraded for operation at the High-Luminosity LHC (HL-LHC), where up to about
200 proton-proton interactions per bunch crossing will impose stringent
requirements on radiation tolerance, bandwidth, and signal reconstruction
performance. The upgraded system is designed to maintain the excellent energy
and timing... -
Sebastian Ritter (Johannes Gutenberg Universität Mainz)02/06/2026, 15:30Oral
The Search for Hidden Particles (SHiP) experiment is a planned general-purpose facility at the CERN Beam Dump Facility designed to explore the hidden sector at the intensity frontier. A primary physics goal of SHiP is the search for long-lived, weakly interacting particles, such as Axion-Like Particles (ALPs) decaying into a diphoton final state ($a \to \gamma\gamma$). Because these decays...
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Dr Matej Haviernik (Prague CU)02/06/2026, 16:30Oral
The Tile Calorimeter, a central hadronic calorimeter of the ATLAS experiment at the Large Hadron Collider, is undergoing a major upgrade to meet the requirements of the High-Luminosity LHC (HL-LHC). The Phase-II upgrade is designed to address the challenges of increased trigger rates up to 1 MHz, higher radiation levels, and enhanced pile-up conditions through a complete redesign of the...
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Suman Kandel (UT Arlington)02/06/2026, 17:00Oral
The Tile Calorimeter (TileCal) is a sampling hadronic calorimeter covering the central region of the ATLAS experiment, using steel absorbers and plastic scintillators as the active medium. It is being extensively upgraded to meet the demands of the High-Luminosity LHC (HL-LHC), expected to start operation in 2030. The HL-LHC will deliver significantly increased instantaneous luminosity,...
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Gerald Eigen (University of Goettingen (DE))02/06/2026, 17:30Oral
We report results from a test beam at DESY in which we tested the readout of 32 3 mm thick ATLAS TileCal tiles with wavelength-shifting fibers and a 64-channel SiPM array. Each tile was read out with two wavelength-shifting fibers that were coupled to the SiPM array via an airgap or with grease. For most measurements the beam was perpendicular to the tiles. We measured the relative gain and...
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LAr speaker committeeOral
The upgrade of the ATLAS Liquid Argon (LAr) calorimeter readout electronics for the High-Luminosity LHC (HL-LHC) introduces a new off-detector processing architecture designed to handle the extreme data rates and pileup conditions expected during HL-LHC operation. Continuous digitization of all calorimeter channels at the 40 MHz bunch-crossing rate will produce data streams corresponding to...
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Ruben Gargiulo (Sapienza University of Rome and INFN)Oral
The High-Luminosity phase of the CERN Large Hadron Collider will pose new challenges for the detectors, such as a large increase in the number of pp collisions per bunch crossing and the higher noise induced by radiation. To cope with these harsh conditions, the readout and trigger electronics of the Electromagnetic Calorimeter (ECAL) of the CMS experiment will undergo a complete replacement....
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