High-Granularity Timing Detector (ATLAS)

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The ATLAS High-Granularity Timing Detector (HGTD) is a planned Phase 2 upgrade to the ATLAS detector that will provide very precise timing information about the arrival of particles in the forward region. Its coverage in pseudorapidity is 2.4 < |\eta| < 4.0. The timing information it provides, with a resolution of around 30 picoseconds, helps suppress pileup effects at the high instantaneous luminosity of the HL-LHC.

The HGTD can help keep isolation efficiencies for electrons high at high pileup.[1]


  1. Hajar Imam, Corentin Allaire, Driss Benchekroun: Lepton isolation with HGTD, ATLAS-internal slides

See also