Dominik Vilsmeier
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View article: Exploration of beamline configuration space for identifying robust quadrupole configurations
Exploration of beamline configuration space for identifying robust quadrupole configurations Open
Experimental beamlines often are regularly reconfigured to meet changing requirements of the experiments and to minimize beam losses. The configuration is usually done with the help of beam optics tools like MADX. These tools offer matchin…
View article: Efficient modeling and mitigation of quadrupole errors in synchrotrons and their beam transfer lines
Efficient modeling and mitigation of quadrupole errors in synchrotrons and their beam transfer lines Open
This thesis investigates the problem of estimating quadrupole errors on synchrotrons as well as how to minimize the influence of quadrupole errors for beam transfer lines (beamlines). It emphasizes the importance to treat possible error so…
View article: Inverse modeling of circular lattices via orbit response measurements in the presence of degeneracy
Inverse modeling of circular lattices via orbit response measurements in the presence of degeneracy Open
The number and location of beam position monitors (BPMs) and steerers with respect to the quadrupoles in a circular lattice can lead to degeneracy in the context of fitting linear optics and extracting lattice information from measured clo…
View article: Inverse modeling of circular lattices via orbit response measurements in the presence of degeneracy
Inverse modeling of circular lattices via orbit response measurements in the presence of degeneracy Open
The number and relative placement of BPMs and steerers with respect to the quadrupoles in a circular lattice can lead to degeneracy in the context of inverse modeling of accelerator optics. Further, the measurement uncertainties introduced…
View article: Analysis of GSI HADES beamline configuration space
Analysis of GSI HADES beamline configuration space Open
The High-Energy Beam Transport system of GSI Campus is a complex system of interconnected beamlines between SIS18 synchrotron and multiple experimental stations and storage rings. This system is designed to be flexible and each experimenta…
View article: Optimization of Heavy-Ion Synchrotrons Using Nature-Inspired Algorithms and Machine Learning
Optimization of Heavy-Ion Synchrotrons Using Nature-Inspired Algorithms and Machine Learning Open
The application of machine learning and nature-inspired optimization methods, like for example genetic algorithms (GA) and particle swarm optimization (PSO) can be found in various scientific/technical areas. In recent years, those approac…
View article: Transfer Line Optics Design Using Machine Learning Techniques
Transfer Line Optics Design Using Machine Learning Techniques Open
Optimization of transfer line optics is essential for delivering high quality beams to the experimental areas. This type of optimization is usually done by hand and relies on the experience of operators. The nature of this task is repetiti…
View article: Space-charge distortion of transverse profiles measured by electron-based Ionization Profile Monitors in presence of external magnetic guiding fields and correction methods
Space-charge distortion of transverse profiles measured by electron-based Ionization Profile Monitors in presence of external magnetic guiding fields and correction methods Open
Measurements of transverse profiles using Ionization Profile Monitors (IPMs) for high brightness beams are affected by the electromagnetic field of the beam. This interaction may cause a distortion of the measured profile shape despite str…
View article: Reconstructing space-charge distorted IPM profiles with machine learning algorithms
Reconstructing space-charge distorted IPM profiles with machine learning algorithms Open
Measurements of undistorted transverse profiles via Ionization Profile Monitors (IPMs) may pose a great challenge for high brightness or high energy beams due to interaction of ionized electrons or ions with the electromagnetic field of th…
View article: Simulation Supported Profile Reconstruction With Machine Learning
Simulation Supported Profile Reconstruction With Machine Learning Open
Measured IPM profiles can be significantly distorted due to displacement of residual ions or electrons by interaction with beam fields for high intensity or high energy beams. It is thus difficult to deduce the characteristics of the actua…
View article: A Modular Application for IPM Simulations
A Modular Application for IPM Simulations Open
Simulating the electron and ion tracking in Ionization Profile Monitors is an important tool for specifying and designing new monitors. It is also essential for understanding the effects related to the ionization process, guiding field non…
View article: Application of Machine Learning for the IPM-Based Profile Reconstruction
Application of Machine Learning for the IPM-Based Profile Reconstruction Open
One of the most reliable devices to measure the transverse beam profile in hadron machines is Ionization Profile Monitor (IPM). This type of monitor can work in two modes: collecting electrons or ions. Typically, for lower intensity beams,…
View article: A modular framework for simulations of Ionization Profile Monitors - Implementation and Benchmarking
A modular framework for simulations of Ionization Profile Monitors - Implementation and Benchmarking Open
Simulations of electron and ion tracking in Ionization Profile Monitors are an important tool for specifying and designing new monitors. They are also essential for understanding the effects related to the ionization process, guiding field…
View article: Ionization Profile Monitor Simulations - Status and Future Plans
Ionization Profile Monitor Simulations - Status and Future Plans Open
Nonuniformities of the extraction fields, the velocity distribution of electrons from ionization processes and strong bunch fields are just a few of the effects affecting Ionization Profile Monitor measurements and operation. Careful analy…