The IDEA detector concept for FCC-ee
Armin Ilg
TL;DR
The paper presents the IDEA detector concept optimized for FCC-ee, integrating a MAPS-based vertex detector, a very light drift chamber, a silicon wrapper, dual-readout crystal ECAL, dual-readout fibre HCAL, an HTS solenoid, and a µ-RWELL muon system. It details current R&D, test-beam results, and simulated performance benchmarks, highlighting improvements in vertexing (e.g., $\sigma(d_0) \approx 2\,\mu\mathrm{m}$) and calorimetric resolutions (ECAL $\sigma_E/E \approx 3\%/\sqrt{E} \oplus 0.5\%$, HCAL $\sim 30\%/\sqrt{E}$), aided by timing capabilities and a 3 T HTS magnet. The concept emphasizes ultra-light materials, precise timing, and full DD4hep simulations to guide digitisation and trigger/DAQ strategies, aiming to enhance Higgs measurements, flavor physics, and long-lived particle searches. Overall, IDEA outlines a feasible, low-material, high-precision detector pathway for FCC-ee that leverages cutting-edge sensors and dual-readout calorimetry to meet stringent future collider requirements.
Abstract
The electron-positron stage of the Future Circular Collider (FCC-ee) provides exciting opportunities that are enabled by next generation particle physics detectors. This contribution presents IDEA, a detector concept optimised for FCC-ee and composed of a vertex detector based on MAPS, a very light drift chamber, a silicon wrapper, a high resolution dual-readout crystal electromagnetic calorimeter, an HTS based superconducting solenoid, a dual-readout fibre calorimeter, and three layers of muon chambers embedded in the magnet flux return yoke. In particular, the physics requirements and the technical solutions chosen in the various sub-systems to address them are discussed. This is followed by a description of the detector R&D currently in progress, test-beam results, and the expected performance on some key physics benchmarks.