Possible topics for theses



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Analysis of polarization effects

The measurement of the electric dipole moment requires an accurate observation of the spin motion
of a particle ensemble. In a bachelor/master thesis the behavior of the spin polarization vector
will be investigated in more detail. Special attention shall be paid to a possible bias of the measurement,
when the polarization is close to zero.

Machine learning at accelerators

The beam properties in an accelerator depend in a non-linear way on thousands of parameters.
Therefore, AI (Artificial Intelligence) and ML (Machine Learning) algorithms are a natural application
for an accelerator complex.
In a bachelor's/master's thesis, the optimization of beam injection into the storage ring COSY
will be investigated.

Spin Dynamics

Extensive simulations of beam and spin dynamics in electromagnetic field configurations must be performed to determine the optimal shape of electrostatic field plates. Programs for beam simulation in electrostatic-magnetic deflection elements are already available and are under continuous development. The main focus of this development is initially on understanding and verifying beam and spin motion in electrostatic fields.


The detection of a beam polarization is done with the help of a polarimeter. The stored particles are elastically scattered at a target. A vertical polarization of the beam manifests itself in a left-right count rate asymmetry in the detector.
The design of the polarimeter requires extensive simulation calculations and test measurements at the cooler synchrotron COSY in Jülich. (Simulation, hardware oriented)

Beam diagnostics

In the context of experiments to determine electric dipole moments of charged particles, it is necessary to precisely determine and correct various beam parameters of the circulating particle beam in a storage ring. In particular, the beam intensity, the beam position and the beam profile have to be measured and adjusted with high accuracy. For this purpose, novel beam diagnostic systems, e.g. based on SQUID technology, are to be compared within the scope of final theses.

Beam dynamics

In the context of experiments for the determination of electric dipole moments of charged particles, it is necessary to optimize the optical setting of the storage ring. In this context, experiments can be performed at the cooler synchrotron COSY in Jülich and compared with computer models. For this purpose, beam-based measurement methods (Orbit-Response, Beam-Based Alignment) are applied, which provide information about the optical setting of the storage ring.

FPGA programming

With the help of programmable logic devices (FPGA=Field Programmable Gate Array) a coincidence logic for a detector will be programmed. The necessary special knowledge for programming an FPGA is not assumed. (hardware oriented, simulation)

Physics of brass instruments

The resonant frequencies of a cylindrical tube are the odd multiples of the fundamental frequency.
However, the natural tone series of brass instruments also contains the even multiples. This is due to the interaction of a cylindrical tube and a conical part.
In this work, the position of the resonant frequencies as a function of the cylindrical and the conical part will be investigated both with the help of simulations and experimentally.