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Systemativc studies of the microbunching and weak instability at short bunch lengths

Brosi, Miriam 1; Blomley, Edmund ORCID iD icon 1; Boltz, Tobias 1; Bründermann, Erik ORCID iD icon 1; Caselle, Michele 2; Gethmann, Julian 3; Kehrer, Benjamin 1; Kuske, Peter; Papash, Alexander I. 1; Rota, Lorenzo; Brosi, Miriam; Blomley, E. ORCID iD icon 1; Boltz, T.; Bründermann, E. ORCID iD icon 1; Caselle, M.; Gethmann, J. 3; Kehrer, B.; Kuske, P.; Papash, A.; ... mehr

Abstract:

At KARA, the Karlsruhe Research Accelerator of the Karlsruhe Institute of Technology synchrotron, the so-called short-bunch operation mode allows the reduction of the bunch length down to a few picoseconds. The microbunching instability resulting from the high degree of longitudinal compression leads to fluctuations in the emitted terahertz radiation. For highly compressed bunches at KARA, the instability occurs not only in one but in two different bunch-current ranges that are separated by a stable region. The additional region of instability is referred to as short-bunch-length bursting or weak instability. We will presents measurements of the threshold currents and fluctuation frequencies in both regimes. Good agreement is found between the measurement and numerical solutions of the Vlasov-Fokker-Planck equation. This contribution is based on the paper Phys. Rev. Accel. Beams 22, 020701.


Zugehörige Institution(en) am KIT Institut für Beschleunigerphysik und Technologie (IBPT)
Institut für Prozessdatenverarbeitung und Elektronik (IPE)
Laboratorium für Applikationen der Synchrotronstrahlung (LAS)
Publikationstyp Vortrag
Publikationsmonat/-jahr 09.2019
Sprache Englisch
Identifikator KITopen-ID: 1000143522
HGF-Programm 54.01.01 (POF III, LK 01) ps- und fs-Strahlen
Veranstaltung ICFA mini-Workshop on "Mitigation of Coherent Beam Instabilities in particle accelerators" (MCBI 2019), Zermatt, Schweiz, 23.09.2019 – 27.09.2019
Bemerkung zur Veröffentlichung https://indico.cern.ch/event/775147/timetable/#20190923.detailed
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