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Digital base-band rf control system for the superconducting Darmstadt electron linear accelerator

Konrad, M. ; Bonnes, U. ; Burandt, C. ; Eichhorn, R. ; Nonn, P. ; Enders, J. ; Pietralla, N. (2012)
Digital base-band rf control system for the superconducting Darmstadt electron linear accelerator.
In: Physical Review Special Topics - Accelerators and Beams, 15 (5)
Artikel, Bibliographie

Kurzbeschreibung (Abstract)

The accelerating field in superconducting cavities has to be stabilized in amplitude and phase by a radio-frequency (rf) control system. Because of their high loaded quality factor superconducting cavities are very susceptible for microphonics. To meet the increased requirements with respect to accuracy, availability, and diagnostics, the previous analog rf control system of the superconducting Darmstadt electron linear accelerator S-DALINAC has been replaced by a digital rf control system. The new hardware consists of two components: An rf module that converts the signal from the cavity down to the base-band and a field-programmable gate array board including a soft CPU that carries out the signal processing steps of the control algorithm. Different algorithms are used for normal-conducting and superconducting cavities. To improve the availability of the control system, techniques for automatic firmware and software deployment have been implemented. Extensive diagnostic features provide the operator with additional information. The architecture of the rf control system as well as the functionality of its components will be presented along with measurements that characterize the performance of the system, yielding, e.g., an amplitude stabilization down to (ΔA/A)rms=7×10-5 and a phase stabilization of (ΔÏ•)rms=0.8° for superconducting cavities.

Typ des Eintrags: Artikel
Erschienen: 2012
Autor(en): Konrad, M. ; Bonnes, U. ; Burandt, C. ; Eichhorn, R. ; Nonn, P. ; Enders, J. ; Pietralla, N.
Art des Eintrags: Bibliographie
Titel: Digital base-band rf control system for the superconducting Darmstadt electron linear accelerator
Sprache: Englisch
Publikationsjahr: Mai 2012
Verlag: American Physical Society
Titel der Zeitschrift, Zeitung oder Schriftenreihe: Physical Review Special Topics - Accelerators and Beams
Jahrgang/Volume einer Zeitschrift: 15
(Heft-)Nummer: 5
Kurzbeschreibung (Abstract):

The accelerating field in superconducting cavities has to be stabilized in amplitude and phase by a radio-frequency (rf) control system. Because of their high loaded quality factor superconducting cavities are very susceptible for microphonics. To meet the increased requirements with respect to accuracy, availability, and diagnostics, the previous analog rf control system of the superconducting Darmstadt electron linear accelerator S-DALINAC has been replaced by a digital rf control system. The new hardware consists of two components: An rf module that converts the signal from the cavity down to the base-band and a field-programmable gate array board including a soft CPU that carries out the signal processing steps of the control algorithm. Different algorithms are used for normal-conducting and superconducting cavities. To improve the availability of the control system, techniques for automatic firmware and software deployment have been implemented. Extensive diagnostic features provide the operator with additional information. The architecture of the rf control system as well as the functionality of its components will be presented along with measurements that characterize the performance of the system, yielding, e.g., an amplitude stabilization down to (ΔA/A)rms=7×10-5 and a phase stabilization of (ΔÏ•)rms=0.8° for superconducting cavities.

Freie Schlagworte: S-DALINAC, RF Engineering, Accelerator Physics, Controls, Instrumentation, SFB634, E2
Fachbereich(e)/-gebiet(e): 05 Fachbereich Physik
05 Fachbereich Physik > Institut für Kernphysik
Hinterlegungsdatum: 11 Feb 2014 10:04
Letzte Änderung: 03 Jun 2018 21:25
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