{"id":73,"date":"2021-05-18T11:11:04","date_gmt":"2021-05-18T11:11:04","guid":{"rendered":"https:\/\/aitanatop.ific.uv.es\/aitanatop\/detector-rd\/?page_id=73"},"modified":"2026-09-01T15:40:50","modified_gmt":"2026-09-01T15:40:50","slug":"high-granular-calorimeters","status":"publish","type":"page","link":"https:\/\/aitanatop.ific.uv.es\/aitanatop\/detector-rd\/research\/high-granular-calorimeters\/","title":{"rendered":"FCAL and DRDCalo: high granular calorimeters"},"content":{"rendered":"\t\t
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High Granular Calorimetry for Higgs Factories and other applications<\/h1>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Sandwich and Compact High Granular calorimeters with integrated electronics<\/p>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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To meet the high precision levels foreseen by future lepton collider experiments, the detectors will be based on Particle Flow (PF) techniques. These techniques consist of choosing the best information available to measure the energy of the final state objects (i.e. measuring the charged particle momentum with tracking devices, where the resolution is better than in the calorimeters). Therefore, PF techniques rely on single-particle separation. For this purpose, PF algorithms require highly granular and compact calorimeter systems featuring minimum dead material.<\/p>

The R&D of highly granular calorimeters, with FCC-ee as one of its main target applications<\/strong>, is currently pursued within the CERN DRD Calo and FCAL collaborations<\/strong>, also addressing the requirements of other future lepton collider projects such as the Linear Collider Facility (LCF)<\/strong>. The technological developments originally conducted within the CALICE collaboration are now integrated into DRD Calo<\/strong>, while FCAL<\/strong> provides a complementary framework particularly focused on compact forward calorimetry, luminometry and related physics applications.<\/p>

IFIC (AITANA) participates in DRD Calo and FCAL<\/strong>, with A. Irles as IFIC institutional board representative for both collaborations.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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DRD Calo<\/span><\/h2>

The Detector R&D Collaboration on Calorimetry, DRD Calo<\/strong>, is a CERN-based collaboration established in 2024 following the recommendations of the ECFA Detector R&D Roadmap. Its main mission is to foster and develop calorimeter concepts required for future high-energy physics experiments and to provide a common framework for the development of technologies, tools and infrastructures shared among different projects.<\/p>

A major target for these developments is the next generation of experiments at FCC-ee<\/strong>, which will require highly performant calorimeter systems capable of meeting the demanding precision goals of a future Higgs, electroweak and top factory. The technologies developed within DRD Calo are also applicable to other future collider projects, including the Linear Collider Facility (LCF)<\/strong>.<\/p>

Electromagnetic and hadronic calorimeter developments are pursued within a unified R&D framework. The activities and technological developments previously organised within the CALICE collaboration have been fully integrated into DRD Calo<\/strong>.<\/p>

The AITANA group contributes in particular to the development of highly granular silicon-based electromagnetic calorimeters and associated detector technologies.<\/p>

FCAL<\/span><\/h2>

The FCAL Collaboration<\/strong>, re-established in its current form in 2025, provides a complementary framework for R&D and physics studies related to very-forward calorimetry and precision luminometry for future lepton colliders<\/strong>, with FCC-ee and LCF among its main applications<\/strong>.<\/p>

FCAL works in close coordination with the CERN Detector R&D programme. Part of its detector R&D shares scientific forums, person-power and experimental infrastructure with DRD Calo<\/strong>, while FCAL also maintains dedicated activities in detector optimisation and in the physics enabled by forward calorimeters and luminometers.<\/p>

Its activities include:<\/p>