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Systematic study of longitudinal excitations to influence the microbunching instability at KARA

Santamaria Garcia, Andrea ORCID iD icon 1; Blomley, Edmund ORCID iD icon 2; Bründermann, Erik ORCID iD icon 2; Caselle, Michele 3; Schreiber, Patrick ORCID iD icon 2; Scomparin, Luca ORCID iD icon 3; Steinmann, Johannes ORCID iD icon 2; Mueller, Anke-Susanne ORCID iD icon; Assmann, Ralph [Hrsg.]; McIntosh, Peter [Hrsg.]; Fabris, Alessandro [Hrsg.]; Bisoffi, Giovanni [Hrsg.]; Andrian, Ivan [Hrsg.]; Vinicola, Giulia [Hrsg.]
1 Laboratorium für Applikationen der Synchrotronstrahlung (LAS), Karlsruher Institut für Technologie (KIT)
2 Institut für Beschleunigerphysik und Technologie (IBPT), Karlsruher Institut für Technologie (KIT)
3 Institut für Prozessdatenverarbeitung und Elektronik (IPE), Karlsruher Institut für Technologie (KIT)

Abstract:

Radio-frequency (RF) modulations can influence the microbunching instability dynamics and serve to eventually control them with reinforcement learning (RL) methods. Implementing such a feedback system at the Karlsruhe Research Accelerator (KARA) will require that the action decided by the RL agent, in this case an RF modulation, is applied effectively to the electron beam. Such a modulation can be carried out at KARA by two different devices: the kicker cavity of the bunch-by-bunch feedback system and the accelerating cavities of the main RF system. The Low-Level RF (LLRF) feedback system would require hardware and firmware modifications to accept the continuous action signal given by the RL agent, so systematic measurements were performed to decide which system should be used in the future. Modulations around different harmonics of the synchrotron frequency were applied and the coherent synchrotron light emitted due to the microbunching dynamics analyzed. These measurements were also performed at negative momentum compaction optics, a regime in which the control of the microbunching instability could yield especially intense light.


Verlagsausgabe §
DOI: 10.5445/IR/1000163615
Veröffentlicht am 09.02.2024
Originalveröffentlichung
DOI: 10.18429/JACoW-IPAC2023-WEPA018
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Beschleunigerphysik und Technologie (IBPT)
Institut für Prozessdatenverarbeitung und Elektronik (IPE)
Laboratorium für Applikationen der Synchrotronstrahlung (LAS)
Publikationstyp Proceedingsbeitrag
Publikationsdatum 26.09.2023
Sprache Englisch
Identifikator ISBN: 978-3-95450-231-8
KITopen-ID: 1000163615
HGF-Programm 54.11.11 (POF IV, LK 01) Accelerator Operation, Research and Development
Weitere HGF-Programme 54.12.03 (POF IV, LK 01) Science Systems
Erschienen in 14th International Particle Accelerator Conference, Venedig, 7th - 12th May 2023
Veranstaltung 14th International Particle Accelerator Conference (IPAC 2023), Venedig, Italien, 07.05.2023 – 12.05.2023
Verlag JACoW Publishing
Seiten 2681-2684
Schlagwörter Accelerator Physics, mc5-beam-dynamics-and-em-fields - MC5: Beam Dynamics and EM Fields, mc5-d06-coherent-and-incoherent-instabilities-measurements-and-countermeasures - MC5.D06: Coherent and Incoherent Instabilities Measurements and Countermeasures
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