Erlangen 2026 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 76: Silicon Detectors VII

T 76.4: Vortrag

Donnerstag, 19. März 2026, 17:00–17:15, KH 01.022

Optimising high resolution time measurement in HVMAPS — •Alexander Schmidt for the HVMAPS HD collaboration — Physikalisches Institut Heidelberg

The phase 2 upgrade of the Mu3e experiment aims for a time resolution of 100ps to suppress coincidental background events. In the many-channel context of pixel sensors, time measurement circuits (TDCs) are constrained by size and current consumption.

This talk gives an overview on the current-capacitance based ramp approach to time measurement. Current HVMAPS prototypes, such as Telepix, achieve TDC resolution of 100ps at 125MHz base clock with minimal optimisation.

In this type of TDC, current consumption is largely driven by constant current sources. It can be reduced drastically by switched current sources. This talk demonstrates a circuit topology which avoids nonlinearity typically introduced by switching transistors.

Keywords: HVMAPS; Mu3e; Silicon Detectors; Parametric Modelling; TDC