Abstract:ATLAS is proposing to replace the entire tracking system for HL-LHC operation. The "Letter of Intent" baseline pixel size at higher radii was 50 × 250 µm 2 (ϕ × η), based on the FE-I4 readout chip, and this was optimized for the central barrel region. The detector tracking performance in the end-cap pixel disks can benefit from enhanced resolution in the radial direction to improve the impact parameter resolution in z-coordinate (along the beam line) for high η tracks, which is critical in the high pile-up env… Show more
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