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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.
IPAC2013: the 4th International Particle Accelerator Conference. Shanghai, China (12.05.2013-17.05.2013)
doi: 10.26083/tuprints-00020328
Conference or Workshop Item, Secondary publication, Publisher's Version

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Item Type: Conference or Workshop Item
Type of entry: Secondary publication
Title: A digital beam-phase control system for a heavy-ion synchrotron with a double-harmonic cavity system
Language: English
Date: 2022
Place of Publication: Darmstadt
Year of primary publication: 2013
Publisher: Joint Accelerator Conferences Website
Book Title: IPAC2013: Proceedings of the 4th International Particle Accelerator Conference
Event Title: IPAC2013: the 4th International Particle Accelerator Conference
Event Location: Shanghai, China
Event Dates: 12.05.2013-17.05.2013
DOI: 10.26083/tuprints-00020328
Corresponding Links:
Origin: Secondary publication service
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.

Status: Publisher's Version
URN: urn:nbn:de:tuda-tuprints-203280
Classification DDC: 600 Technology, medicine, applied sciences > 620 Engineering and machine engineering
Divisions: 18 Department of Electrical Engineering and Information Technology > Institut für Automatisierungstechnik und Mechatronik > Control Methods and Robotics (from 01.08.2022 renamed Control Methods and Intelligent Systems)
Date Deposited: 19 Jan 2022 09:22
Last Modified: 20 Mar 2023 14:37
URI: https://tuprints.ulb.tu-darmstadt.de/id/eprint/20328
PPN: 490518974
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