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Description
The ePIC experiment will be the first detector of the future Electron-Ion Collider (EIC), at Brookhaven National Laboratory (BNL) by 2035.
The collisions between EIC’s polarized beams will allow us to probe nuclei and nucleons with unprecedented precision, and thus to gain access to some of the main open issues in nuclear physics: the source of the proton spin, the origin of mass in nucleons, the inner workings of confinement, and gluon saturation at high energy.
To pursue these ambitious physics goals, ePIC will deploy an array of innovative detector technologies within the compact and hermetic design of its asymmetric central detector.
The MPGD Endcap Tracker (ECT), complementing the tracking capabilities of the large central Silicon Vertex Tracker (SVT) in the high pseudorapidity regions, will consist of four disks based on the hybrid G-RWELL technology, GEM enhanced μ-RWELL detectors.
Designed to maximize acceptance and minimize material budget in the active regions, the ECT aims to achieve 150 μm spatial resolution and better than 20 ns time resolution, conserving performance for inclined tracks through the implementation of advanced μTPC reconstruction algorithms.
This contribution will focus on the preliminary design of ePIC’s MPGD endcap tracker, highlighting the extensive R&D effort towards the fabrication of its first full-size engineering test article and its validation with muon and pion beams during the 2025 test beam campaign.
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