Speaker
Description
Particle trackers at current and future colliders are increasingly incorporating precision timing. The ATLAS HGTD and CMS MTD, built for the HL-LHC, target time resolutions below 50 ps, and trackers for a future muon collider or 10 TeV hadron collider will require similar or better timing resolution with pixel pitches in the tens of microns.
Using device-level simulations, we show that an LGAD-based tracker with O(10 ps) hit time resolution and a pixel pitch in the tens of microns can determine the angle at which the track crosses the detector from the relative timing of neighboring pixels, without requiring a double layer. This effect must be accounted for when reconstructing the hit time of a cluster, since it can shift hit times by hundreds of picoseconds. We study how the angular reconstruction performance depends on pixel dimensions, and how intrinsic crosstalk between neighboring LGAD pixels can significantly distort current waveforms, timing, and the reconstructed angle. Finally, we present preliminary experimental measurements that support these findings.