ASIC development for picosecond timing in 4D tracking at PSI

Monday 19 Oct 2026, 10:00 → 11:00 Europe/Zurich

Meeting room 5, 4th floor (Postsparkasse)

Future particle physics experiments increasingly rely on precision timing to complement spatial information and enable true 4D tracking in very dense environments. Achieving time resolutions of a few tens of picoseconds requires the sensor, analog front-end, discriminator, time-to-digital conversion and readout system to be designed as a complete timing chain.

In this seminar, I will present the development of LIGHT01, a 64-channel prototype ASIC designed in 28 nm CMOS for the readout of trench-isolated LGAD pixels. I will discuss the main system requirements, the low-jitter analog front-end, the per-pixel TDC architecture, calibration and time-walk correction techniques, and the challenges associated with maintaining picosecond-level precision in a highly integrated pixel matrix. I will then present the first characterization results, the hybridization of the ASIC with Ti-LGAD sensors, source measurements, and the first operation of the complete detector in a particle beam at DESY.

10:00 → 10:45 ASIC development for picosecond timing in 4D tracking at PSI

Speakers: Abderrahmane GHIMOUZ (Univ. Grenoble Alpes, Grenoble INP, CNRS, LPSC-IN2P3), Abderrahmane Ghimouz (Paul Scherrer Institute (CH))