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A digital beam-phase control system for a heavy-ion synchrotron with a double-harmonic cavity system

Grieser, Jochen ; Lens, Dieter Etienne Mia ; Hartel, Uta ; Klingbeil, Harald ; Laier, Ulrich ; Ningel, Klaus-Peter ; Schäfer, S. ; Zipfel, Bernhard (2022):
A digital beam-phase control system for a heavy-ion synchrotron with a double-harmonic cavity system. (Publisher's Version)
In: IPAC2013: Proceedings of the 4th International Particle Accelerator Conference, pp. 2926-2928,
Darmstadt, Joint Accelerator Conferences Website, IPAC2013: the 4th International Particle Accelerator Conference, Shanghai, China, 12.-17.05.2013, ISBN 978-3-95450-122-9,
DOI: 10.26083/tuprints-00020328,
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Item Type: Conference or Workshop Item
Origin: Secondary publication service
Status: Publisher's Version
Title: A digital beam-phase control system for a heavy-ion synchrotron with a double-harmonic cavity system
Language: English
Abstract:

For the new Facility for Antiproton and Ion Research (FAIR) at GSI Helmholtzzentrum für Schwerionenforschung GmbH (http://www.gsi.de), the heavy ion synchrotron SIS18 will be operated with a double harmonic cavity system. The second cavity, running at twice the fundamental frequency, is used to create a lengthened bucket which introduces nonlinearities to the control system. To damp longitudinal rigid dipole oscillations a digital feedback system consisting of a filter and an integrator is used. For the existing single-harmonic setup an FIR-filter is implemented which realizes a multiple bandpass filter with the first passband centre frequency close to the synchrotron frequency. Both, the feedback gain and the passband frequency of the filter depend on the actual value of the synchrotron frequency. It was shown by simulations and in an experiment that this setup can be transferred to a double-harmonic cavity system obtaining similar results for the region of stabilizing feedback parameters, if the oscillation frequency of the bunch barycenter is considered instead of the synchrotron frequency of a linearized bucket.

Book Title: IPAC2013: Proceedings of the 4th International Particle Accelerator Conference
Place of Publication: Darmstadt
Publisher: Joint Accelerator Conferences Website
Classification DDC: 600 Technik, Medizin, angewandte Wissenschaften > 620 Ingenieurwissenschaften
Divisions: 18 Department of Electrical Engineering and Information Technology > Institut für Automatisierungstechnik und Mechatronik > Control Methods and Robotics
Event Title: IPAC2013: the 4th International Particle Accelerator Conference
Event Location: Shanghai, China
Event Dates: 12.-17.05.2013
Date Deposited: 19 Jan 2022 09:22
Last Modified: 19 Jan 2022 09:23
DOI: 10.26083/tuprints-00020328
Corresponding Links:
URN: urn:nbn:de:tuda-tuprints-203280
URI: https://tuprints.ulb.tu-darmstadt.de/id/eprint/20328
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