M.Sc. Simon Frank

Marco Gast

Motivation:  

The muon collider studies are part of the official European strategy for particle accelerators from 2022 to 2026. Muons are very interesting fundamental particles for physicists because they allow at the same time, precise measurements with a big potential for new discoveries. Compared with electrons (also fundamental particles) muons are extremely unstable and their lifetime at rest is only 2.2us. Once generated, muons must be rapidly accelerated and sent to the collider where collisions among them can take place.

The accelerator is therefore one of the most important and costly equipment for which several challenges exist and the topology, size and cost of the powering scheme must be studied and optimized with respect to the other technologies present in the accelerator.

Project deliverables

The analysis and design of different powering solutions which includes the optimization of the topologies regarding the accuracy of the numerous sectors and the overall costs of the system. The magnetic field of the sectors should be in the range of 10 to 100 ppm of the reference. Furthermore, the analysis of controllability in different scenarios like changing parameters of the magnets and the dimensioning of IGBTs and analysis of commutation effects (including research on parallel operation of IGBTs), as well as jitter of the gate signals and their effects on the magnetic field.

In addition, the design of the dipole magnets is to be investigated, including the analysis of the effect of eddy currents, as well as other effects on the accuracy of the magnetic field. Further, the simulation of the heating of the coils to determine their size and the approximated design of the coil's water cooling.