A SiPM-on-tile calorimeter prototype was deployed, calibrated, and operated for the first time in a collider environment, withstanding about 1e10 1-MeV neutron-equivalent fluence at room temperature.
A Few-Degree Calorimeter for the future Electron-Ion Collider
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abstract
Measuring the region $0.1 < Q^{2} < 1.0$ GeV$^{2}$ is essential to support searches for gluon saturation at the future Electron-Ion Collider. Recent studies have revealed that covering this region at the highest beam energies is not feasible with current detector designs, resulting in the so-called $Q^{2}$ gap. In this work, we present a design for the Few-Degree Calorimeter (FDC), which addresses this issue. The FDC uses SiPM-on-tile technology with tungsten absorber and covers the range of $-4.6 < \eta < -3.6$. It offers fine transverse and longitudinal granularity, along with excellent time resolution, enabling standalone electron tagging. Our design represents the first concrete solution to bridge the $Q^{2}$ gap at the EIC.
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First-Ever Deployment of a SiPM-on-Tile Calorimeter in a Collider: A Parasitic Test with 200 GeV $pp$ Collisions at RHIC
A SiPM-on-tile calorimeter prototype was deployed, calibrated, and operated for the first time in a collider environment, withstanding about 1e10 1-MeV neutron-equivalent fluence at room temperature.