Grieser, Jochen Michael (2015)
Beam Phase Feedback in a Heavy-Ion Synchrotron with Dual-Harmonic Cavity System.
Technische Universität Darmstadt
Dissertation, Erstveröffentlichung
Kurzbeschreibung (Abstract)
This dissertation contributes to the design and analysis of bunch phase feedback systems in a heavy-ion synchrotron which is operated with a dual-harmonic cavity system. Due to the ring structure of the synchrotron the particles are focused in transverse and longitudinal direction forming particle bunches, which may be subject to various disturbances. Depending on the disturbance, bunch oscillations may occur, which lower the beam quality and may also lead to particle loss. This compromises the efforts which are constantly taken to increase the beam intensity, energy and quality. Thus, control measures are taken to stabilize the beam, which are usually based on the linearized single particle dynamics. In the present case, however, the accelerating voltage is supplied by two cavities running with different frequencies, introducing an additional nonlinearity, and simple linearization of the voltage is no longer possible. The problem of modeling and damping of rigid dipole oscillations in case of a dual-harmonic cavity system is treated here by deriving a simple linear model based on central moments, which is accurate enough to serve as a base for various control design approaches. Beside the feedback already existing at GSI Helmholtzzentrum für Schwerionenforschung GmbH for single-harmonic operation based on a finite impulse response filter, which is transferred here to the dual-harmonic case, an alternative filter design for the feedback is presented, along with different output controllers based on pole placement and a state feedback combined with an observer. The effectiveness of the feedback with a finite impulse response filter was demonstrated in two beam experiments, which are also presented in this dissertation.
Typ des Eintrags: | Dissertation | ||||
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Erschienen: | 2015 | ||||
Autor(en): | Grieser, Jochen Michael | ||||
Art des Eintrags: | Erstveröffentlichung | ||||
Titel: | Beam Phase Feedback in a Heavy-Ion Synchrotron with Dual-Harmonic Cavity System | ||||
Sprache: | Englisch | ||||
Referenten: | Adamy, Prof. Dr. Jürgen ; Klingbeil, Prof. Dr. Harald | ||||
Publikationsjahr: | 10 Juli 2015 | ||||
Ort: | Darmstadt | ||||
Datum der mündlichen Prüfung: | 17 Dezember 2014 | ||||
URL / URN: | http://tuprints.ulb.tu-darmstadt.de/4634 | ||||
Kurzbeschreibung (Abstract): | This dissertation contributes to the design and analysis of bunch phase feedback systems in a heavy-ion synchrotron which is operated with a dual-harmonic cavity system. Due to the ring structure of the synchrotron the particles are focused in transverse and longitudinal direction forming particle bunches, which may be subject to various disturbances. Depending on the disturbance, bunch oscillations may occur, which lower the beam quality and may also lead to particle loss. This compromises the efforts which are constantly taken to increase the beam intensity, energy and quality. Thus, control measures are taken to stabilize the beam, which are usually based on the linearized single particle dynamics. In the present case, however, the accelerating voltage is supplied by two cavities running with different frequencies, introducing an additional nonlinearity, and simple linearization of the voltage is no longer possible. The problem of modeling and damping of rigid dipole oscillations in case of a dual-harmonic cavity system is treated here by deriving a simple linear model based on central moments, which is accurate enough to serve as a base for various control design approaches. Beside the feedback already existing at GSI Helmholtzzentrum für Schwerionenforschung GmbH for single-harmonic operation based on a finite impulse response filter, which is transferred here to the dual-harmonic case, an alternative filter design for the feedback is presented, along with different output controllers based on pole placement and a state feedback combined with an observer. The effectiveness of the feedback with a finite impulse response filter was demonstrated in two beam experiments, which are also presented in this dissertation. |
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Alternatives oder übersetztes Abstract: |
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Freie Schlagworte: | beam phase feedback, dual-harmonic, synchrotron, rigid dipole oscillation, beam dynamics | ||||
URN: | urn:nbn:de:tuda-tuprints-46340 | ||||
Sachgruppe der Dewey Dezimalklassifikatin (DDC): | 600 Technik, Medizin, angewandte Wissenschaften > 620 Ingenieurwissenschaften und Maschinenbau | ||||
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 (ab 01.08.2022 umbenannt in Regelungsmethoden und Intelligente Systeme) |
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Hinterlegungsdatum: | 27 Sep 2015 19:55 | ||||
Letzte Änderung: | 27 Sep 2015 19:55 | ||||
PPN: | |||||
Referenten: | Adamy, Prof. Dr. Jürgen ; Klingbeil, Prof. Dr. Harald | ||||
Datum der mündlichen Prüfung / Verteidigung / mdl. Prüfung: | 17 Dezember 2014 | ||||
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