SMuK 2023 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 148: Si/SiPM, Pixel/Other

T 148.6: Vortrag

Donnerstag, 23. März 2023, 18:45–19:00, WIL/C307

Simulations for High-Granularity LGAD Sensors using Commercial CMOS Technologies — •Saqlain Khan¹, Sinuo Zhang¹, Tomasz Hemperek², and Jochen Dingfelder¹ — ¹Physikalisches Institut, Universität Bonn — ²Dectris, Switzerland

Low-Gain Avalanche Diode (LGAD) detectors can provide a time resolution an order of magnitude better than traditional silicon detectors. This enhancement is enabled by the implementation of controlled low gain in the detector response. One of the challenges in LGAD design is to achieve a high granularity. The granularity is constrained due to the design of an inter-channel protection structure referred to as "Junction Termination Extension" (JTE). This structure avoids breakdown between channels but also creates regions where charge collection is severely limited. An approach in the direction of improving the granularity is to have the gain layer of LGAD buried deep inside and below the readout surface. In this way, inter-channel breakdown is avoided and a high granularity could be achieved.

CMOS pixel sensors utilizing commercial processes are promising methods to be used in high energy particle physics experiments for high-precision charged particle tracking. In this talk, TCAD simulations to investigate the feasibility of the aforementioned approach using a commercial CMOS process will be presented.