ATLAS High-Granularity Timing Detector On-detector Readout System

The HGTD is a novel detector introduced to augment the new all-silicon Inner Tracker in the pseudo-rapidity range from 2.4 to 4.0, adding the capability to measure charged-particle trajectories in time as well as space. A prototype of Peripheral Electronics Board (PEB), which supports up to 55 front-end modules with 12 lpGBT, 9 VTRx+ and 52 bPOL12v, is developed to work as a bridge between the front-end modules and the off-detector TDAQ. The on-going R&D effort carried out to study the readout and transmission chips, and the other components, supported by laboratory results, will also be presented.