Dokument: Particle acceleration in plasmas: non-linear wakefields for leptons and magnetic vortices for spin-polarized protons
| Titel: | Particle acceleration in plasmas: non-linear wakefields for leptons and magnetic vortices for spin-polarized protons | |||||||
| URL für Lesezeichen: | https://docserv.uni-duesseldorf.de/servlets/DocumentServlet?id=61284 | |||||||
| URN (NBN): | urn:nbn:de:hbz:061-20221123-125750-2 | |||||||
| Kollektion: | Dissertationen | |||||||
| Sprache: | Englisch | |||||||
| Dokumententyp: | Wissenschaftliche Abschlussarbeiten » Dissertation | |||||||
| Medientyp: | Text | |||||||
| Autor: | Reichwein, Lars [Autor] | |||||||
| Dateien: |
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| Beitragende: | Prof. Dr. Pukhov, Alexander [Gutachter] Prof. Dr. Dr. Müller, Carsten [Gutachter] Prof. Dr. Rosmej, Olga [Gutachter] | |||||||
| Dewey Dezimal-Klassifikation: | 500 Naturwissenschaften und Mathematik » 530 Physik | |||||||
| Beschreibung: | Plasma-based accelerators are considered a promising alternative to large and expensive conventional accelerator structures since the higher field strengths that can be applied allow for more compact designs. This is of high interest since research in fundamental physics requires high energies for e.g. the discovery of new particles. Still, a lot of research must be performed in order to make these setups competitive in areas like energy, charge and general beam quality.
In the first part of this thesis, we investigate the so-called wakefield acceleration for lep- tons where a particle beam or a laser pulse drives a plasma wave that has accelerating and focusing fields for electrons. Within this part, we develop new models for the description of the cavities in wakefield acceleration that better incorporate properties of the longitu- dinal electric field, and that are self-consistent. Positron acceleration is generally more problematic, as their opposite charge renders the field regions used for electron wakefield acceleration useless. We present a setup driven by both a particle and a laser beam which allows for the acceleration of positron rings. The proposed setup is investigated using both analytical methods as well as particle-in-cell simulations. Besides the more general wakefield investigations, we also look into the inner structure of the accelerated electron beam in the case of finite emittance. Lastly for this chapter, we examine the influence of structured plasma in the form of clustered Hydrogen on the acceleration mechanisms in laser-plasma interaction. In the second part of this thesis, we study the acceleration of protons by Magnetic Vortex Acceleration. More specifically, we examine the acceleration of spin-polarized particle beams that are of interest i.a. for probing the nuclear structure of the proton or polarized fusion. We start by studying the influence of a density-down ramp at the end of the plasma target with which the laser pulse interacts on beam quality. Finally, we present a setup consisting of two laser pulses propagating side-by-side that yields better spin polarization and beam quality compared to a single-pulse setup. | |||||||
| Lizenz: |  Dieses Werk ist lizenziert unter einer Creative Commons Namensnennung 4.0 International Lizenz | |||||||
| Fachbereich / Einrichtung: | Mathematisch- Naturwissenschaftliche Fakultät » WE Physik » Theoretische Physik | |||||||
| Dokument erstellt am: | 23.11.2022 | |||||||
| Dateien geändert am: | 23.11.2022 | |||||||
| Promotionsantrag am: | 11.08.2022 | |||||||
| Datum der Promotion: | 10.11.2022 |
