Commissioning of the harmonic cavities in the MAX IV 3 GeV ring

Skripka, G.Lund University,Lunds universitet,MAX IV-laboratoriet,MAX IV Laboratory (författare)

The MAX IV 3 GeV storage ring operates with beam of high current and ultralow emittance. These beam parameters in combination with the small effective aperture enhance possible collective beam instabilities. Three passive harmonic cavities are installed to introduce bunch lengthening and tune spread, leading to decoupling of the bunch spectrum from the machine effective impedance and mitigating instabilities by Landau damping respectively. In this paper we present the first results of the commissioning of the passive third harmonic cavities in the MAX IV 3 GeV ring. The additional harmonic cavity potential significantly improved the beam lifetime. First observations of the harmonic cavity effect on the damping of collective beam instabilities are discussed.

Andersson, ÅkeLund University,Lunds universitet,MAX IV-laboratoriet,MAX IV Laboratory(Swepub:lu)maxl-aan (författare)
Mitrovic, A.Lund University,Lunds universitet,MAX IV-laboratoriet,MAX IV Laboratory(Swepub:lu)maxl-alm (författare)
Fernandes Tavares, PedroLund University,Lunds universitet,MAX IV-laboratoriet,MAX IV Laboratory(Swepub:lu)maxl-pfe (författare)
Cullinan, F. J.Synchrotron SOLEIL (författare)
Nagaoka, RyutaroSynchrotron SOLEIL (författare)
Lunds universitetMAX IV-laboratoriet (creator_code:org_t)

Ingår i:IPAC 2016 - Proceedings of the 7th International Particle Accelerator Conference, s. 2911-29139783954501472

Av författaren/redakt...: Skripka, G.; Andersson, Åke; Mitrovic, A.; Fernandes Tavare ...; Cullinan, F. J.; Nagaoka, Ryutaro

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