Development of non amplified Depleted MAPS sensors towards 50 ps timing resolution on charged particles

TL;DR

This paper reports on the development and testing of non-amplified CMOS sensors capable of achieving approximately 60 ps timing resolution for charged particles, advancing particle detection technology.

Contribution

It introduces the MiniCactus V2 sensor design and demonstrates its promising timing performance in test-beam experiments.

Findings

Achieved 60 ps timing resolution with MiniCactus V2

Used 150 nm CMOS technology for sensor fabrication

Demonstrated potential for 50 ps timing with further optimization

Abstract

The MiniCactus sensors are demonstrator sensors designed in LFoundry LF15A 150 nm technology, intended to study the performance of non amplified High Voltage High Resistivity CMOS sensors for measurement of time of arrival of charged particles. This paper presents the context, design features and some of the first test-beam results obtained with the latest MiniCactus sensor version, MiniCactus V2. With a 175 micron thick sensor biased at -350 V, we have obtained a 60 ps time resolution on Minimum Ionizing Particles detected with a 500 micron by 500 micron pixel.