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Modeling and Control of Longitudinal Single-Bunch Oscillations in Heavy-Ion Synchrotrons

Lens, Dieter :
Modeling and Control of Longitudinal Single-Bunch Oscillations in Heavy-Ion Synchrotrons.
VDI Verlag , Düsseldorf
[Dissertation], (2012)

Kurzbeschreibung (Abstract)

This thesis contributes to the modeling and analysis of longitudinal radio frequency (RF) feedback systems in heavy-ion synchrotrons. Synchrotrons are ring accelerators with a constant reference orbit of the particle beam. They allow the acceleration of particles such as electrons, protons, and heavy ions to highest energies. The desired specifications for beam properties such as the quality, energy, and intensity drive the development of new accelerator components. Among other objectives, the stabilization of the beam before and during the acceleration is desirable to preserve the beam quality. The thesis deals with the modeling of longitudinal coherent oscillations of a bunched beam. The main focus is on the usability of the models for the analysis and design of digital RF feedback loops. The analysis of these models with methods from control theory leads to new insight into the possibilities of RF feedback with regard to the longitudinal beam stabilization. In particular it is shown that the nonlinearity of the beam dynamics plays a major role in the damping of coherent oscillations of higher order. An analysis of a specific RF feedback setup and the comparison with experimental data shows the practical relevance of the models.

Typ des Eintrags: Dissertation
Erschienen: 2012
Autor(en): Lens, Dieter
Titel: Modeling and Control of Longitudinal Single-Bunch Oscillations in Heavy-Ion Synchrotrons
Sprache: Englisch
Kurzbeschreibung (Abstract):

This thesis contributes to the modeling and analysis of longitudinal radio frequency (RF) feedback systems in heavy-ion synchrotrons. Synchrotrons are ring accelerators with a constant reference orbit of the particle beam. They allow the acceleration of particles such as electrons, protons, and heavy ions to highest energies. The desired specifications for beam properties such as the quality, energy, and intensity drive the development of new accelerator components. Among other objectives, the stabilization of the beam before and during the acceleration is desirable to preserve the beam quality. The thesis deals with the modeling of longitudinal coherent oscillations of a bunched beam. The main focus is on the usability of the models for the analysis and design of digital RF feedback loops. The analysis of these models with methods from control theory leads to new insight into the possibilities of RF feedback with regard to the longitudinal beam stabilization. In particular it is shown that the nonlinearity of the beam dynamics plays a major role in the damping of coherent oscillations of higher order. An analysis of a specific RF feedback setup and the comparison with experimental data shows the practical relevance of the models.

Reihe: Fortschritt-Berichte VDI : Reihe 8, Meß-, Steuerungs- und Regelungstechnik
(Heft-)Nummer: 1209
Ort: Düsseldorf
Verlag: VDI Verlag
Fachbereich(e)/-gebiet(e): 18 Fachbereich Elektrotechnik und Informationstechnik
18 Fachbereich Elektrotechnik und Informationstechnik > Institut für Automatisierungstechnik und Mechatronik
18 Fachbereich Elektrotechnik und Informationstechnik > Institut für Automatisierungstechnik und Mechatronik > Regelungsmethoden und Robotik
18 Fachbereich Elektrotechnik und Informationstechnik > Institut für Theorie Elektromagnetischer Felder
18 Fachbereich Elektrotechnik und Informationstechnik > Institut für Theorie Elektromagnetischer Felder > Beschleunigertechnik
Hinterlegungsdatum: 25 Mai 2012 14:06
Gutachter / Prüfer: Adamy, Prof. Dr.- Jürgen ; Klingbeil, Prof. Dr.- Harald
Datum der Begutachtung bzw. der mündlichen Prüfung / Verteidigung / mdl. Prüfung: 20 Januar 2012
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