Heidelberg 2022 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 40: Pixel Detectors 2

T 40.3: Vortrag

Dienstag, 22. März 2022, 16:45–17:00, T-H25

Simulating Hexagonal Monolithic Pixel Sensors in CMOS Imaging Technology — •Larissa Mendes for the Tangerine collaboration — Deutsches Elektronen-Synchrotron (DESY), Hamburg, Germany

In this research, monolithic pixel sensors in CMOS imaging technologies with small collection electrodes are investigated for fast signal collection and precise timing to be used at future lepton colliders. Integrated monolithic CMOS offers a cost-effective monolithic integration of sensor and electronics. It allows significant reductions in the material budget compared to hybrid pixel detectors, providing an excellent signal-to-noise ratio and position resolution.

When compared to a square grid, the distance between the pixel border and the collection electrode can be reduced by placing the collection electrodes on a hexagonal grid for a given area defined by the circuit functionality. The hexagonal grid reduces charge sharing, increasing the signal in the seed pixel. The studies are being carried out with 3D Synopsys' Technology Computer-Aided Design (TCAD) to create a sensor structure that can optimize the depletion region size and increase the lateral electric field for fast charge collection by drift. The electrode size, electrode size, as well as other parameters of the sensor design, are optimized using 3D TCAD simulations.