Prof. Dr. Stephan Paul
Courses and Dates
Offered Bachelor’s or Master’s Theses Topics
- Construction and Test of a Scintillating-Fiber Tracker for a Measurement of the Proton Radius at CERN’s Super Proton Synchrotron
The proton is one of the primary building blocks of all matter in the visible universe and as such is at the core of the quest for understanding nature. Yet, many of its properties are not well understood. At the center of current interest stands its charge radius, oftentimes simply referred to as the proton radius. Recent measurements of this fundamental quantity are in significant disagreement with each other, in what is often called the proton radius puzzle.
As part of an international collaboration, we intend to measure the proton radius through elastic muon-proton scattering with a high-energy muon beam at CERN’s Super Proton Synchrotron starting in 2021. The experiment requires the development of several new particle detectors, among them a fast tracking detector made of scintillating-plastic fibers. The construction and test of this tracker is the main objective of this thesis.
- Acquire the necessary understanding of the fundamentals of particle detection, scintillating materials, photodetectors, and detector read-out electronics.
- Perform initial tests of detector components in the laboratory environment.
- Design, construct, and commission three prototype detectors.
- Conduct a system test at the MAMI accelerator facility in Mainz.
- Analyze the performance of the tracker system.
What We Offer
We offer you to make your contribution to a new experiment trying to solve one of the most puzzling discrepancies in our understanding of the nature of matter. You will gain experience in detector design, electronics design, and data analysis. And you will get the chance to perform an experiment at a particle accelerator facility!
- suitable as
- Master’s Thesis Nuclear, Particle, and Astrophysics
- Master’s Thesis Applied and Engineering Physics
- Supervisor: Stephan Paul