Silizium Labor Bonn Thesis Topics


Silizium Labor Bonn (SiLab) is a detector physics group, located at the University of Bonn, Germany.

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The following lists available thesis topics at Silizium Labor Bonn

( Last modified: February 18, 2021 )

BELLE 2 Pixeldetector

BELLE 2 silicon vertex detector (SVD) and PXD

The BELLE 2 particle collision experiment in Japan started taking data in spring 2019. A european collaboration led by Germany developed the pixel detector (PXD) for particle tracking and vertex determination in the experiment. The sensors of the PXD are based on DEpleted P-channel Field Effect Transistors (DEPFETs). The SiLab group has been involved for 10 years in the investigation of this technology and the development and testing of the final components.

Topic: Characterization of Detector Modules for the PXD 2 Upgrade

(Last modified on: October 10, 2019)

Topic: Investigation of Radiation Hardness and Radiation Burst Events of PXD ASICs and Sensors

(Last modified on: October 10, 2019)

Sensor Development

From daily use digital cameras, medical X-ray imaging devices to particle tracking detectors in high energy physics (HEP) experiments, silicon pixel sensors efficiently convert photons and charged particles to electric signals. Like all semiconductor devices, the development of pixel sensors follows the cyclic procedure of: design → produce → test → optimize, aiming to achieve high spatial resolution and efficiency as well as low leakage current. Especially in the field of HEP, radiation-tolerant sensors need to be developed to withstand severe radiation damage.

Device Simulation and Optimization

TCAD simulation and potential gradient of monolithic pixel

Numerical simulation offers an efficient way for testing and optimzing pixel sensors. TCAD ( Technology Computer Aided Design) is a powerful software for such purposes and widely-used in the semiconductor industry. You will first need an insight on the general semiconductor device manufacturing processes and construct the sensor with the software. The device simulation offers you a chance to proceed experiments, while exploring enormous amount of physical models and discovering the physics behind the data.

Topic: Guard Rings

(Last modified on: January 06, 2020)

Depleted Monolithic Active Pixel Sensors

TJ_Monopix1 pixel detector

Monolithic pixel detectors are a rather novel approach that combine the sensor (where charges are created) and the readout part (digitization) on the same wafer. This approach makes costly production steps like combining two different chips for sensor and readout redundant.

The development from our group (in collaboration with CERN and institutes from France) focuses on building such monolithic devices with radiation hardness and timing capabilities comparable to the requirements of ATLAS outer pixel layers.

Topic: Charge calibration of TJ-Monopix1

(Last modified on: September 02, 2020)