Observations on MIMOSIS-0, the first dedicated CPS prototype for the CBM MVD

TL;DR

This paper discusses the design and initial testing of MIMOSIS-0, the first dedicated CMOS Monolithic Active Pixel Sensor prototype for the CBM Micro Vertex Detector, aiming to meet stringent spatial, material, and rate requirements.

Contribution

It introduces the MIMOSIS-0 prototype and details its design approach to address the demanding specifications of the CBM experiment's MVD.

Findings

First test results of MIMOSIS-0 sensor prototype

Design approach for high-rate, low-material-budget detector

Requirements analysis for future CMOS sensors

Abstract

The Micro Vertex Detector (MVD) of the future Compressed Baryonic Matter (CBM) experiment at FAIR will have to provide a spatial precision of $\sim 5~\rm \mu m$ in combination with a material budget of 0.3\% - 0.5\% X$_0$ for a full detector station. Simultaneously, it will have to handle the rate and radiation load of operating the fixed target experiment at an average collision rate of 100 kHz (4 - 10 AGeV Au+Au collisions) or 10 MHz (up to 28 GeV p-A collisions). The harsh requirements call for a dedicated detector technology, which is the next generation CMOS Monolithic Active Pixel Sensor MIMOSIS. We report about the requirements for the sensor, introduce the design approach being followed to cope with it and show first test results from a first sensor prototype called MIMOSIS-0 .