Würzburg 2018 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 5: Pixel-Detektoren I
T 5.7: Vortrag
Montag, 19. März 2018, 17:30–17:45, Philo-HS5
TCAD Simulation for the study of the MuPix Sensor — •Annie Meneses Gonzalez for the Mu3e collaboration — Physikalisches Institut, Universität Heidelberg, Germany
The goal of the Mu3e experiment is to search for the lepton flavor violation decay µ+→ e+e−e+ with an ultimate sensitivity (in phase II) of one in 1016 µ -decays, four orders of magnitude better than the current experimental limit. This gain is considered possible by fully exploiting advances in silicon detector technologies, data transfer, and processing.
The main challenges of the experiment are to run in a high rate muon beam, excellent momentum resolution and precise vertex and timing resolution. Due to the low momenta of the decays electrons, multiple Coulomb scattering is dominating the momentum measurement precision. The Mu3e pixel tracker is based on thin High-Voltage Monolithic Active Pixel Sensors which allows to integrate sensor and readout functionalities in the same device, reducing the material budget and improving the momentum resolution.
Technology Computer Aided Design (TCAD) is used to develop and optimize semiconductor processing technologies and devices. In this work results from TCAD Simulation on the charge collection time of the MuPix7 sensor are presented and compared to experimental data for different bias voltages and hits positions inside the pixel cell. Using the same physics model, some main characteristics of the MuPix8 prototype are also presented.