| 1. |
- Brosi, Miriam, et al.
(author)
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Time-resolved measurement and simulation of a longitudinal single-bunch instability at the MAX IV 3 GeV ring
- 2023
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In: 14th International Particle Accelerator Conference. - 9783954502318 ; , s. 2685-2688
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Conference paper (other academic/artistic)abstract
- The study and understanding of collective effects plays a vital role for fourth-generation light sources. These effects mostly need to be mitigated and controlled to achieve the design operational parameters. However, they can also be utilized to gain insights into the properties of the machine. While the 3 GeV storage ring at the MAX IV light source is running in multi-bunch mode during user operation. Single-bunch operation is available in dedicated machine study shifts, providing the possibility to study collective effects at higher bunch currents. In such a current range an instability has been observed in the longitudinal plane. Above the threshold current of the instability a dynamic deformation of the bunch profile and a strong increase in energy spread occurs. Dedicated measurements were conducted with multiple diagnostic tools such as time-resolved bunch profile measurements. First simulations of the observed effects were performed with a Vlasov-Fokker-Planck solver. This contribution presents measurement results and draws a comparison to the simulations.
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| 2. |
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| 3. |
- Maier, Sebastian, et al.
(author)
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Simulation studies on longitudinal beam dynamics manipulated by corrugated structures under different bunch length conditions at KARA
- 2023
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In: Proc. IPAC'23. - 9783954502318 ; , s. 3570-3573
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Conference paper (other academic/artistic)abstract
- In the KIT storage ring KARA (Karlsruhe Research Accelerator), two parallel plates with periodic rectangular corrugations are planned to be installed. These plates will be used for impedance manipulation to study and eventually control the electron beam dynamics and the emitted coherent synchrotron radiation (CSR). In this contribution, we present simulation results showing the influence of different corrugated structures on the longitudinal beam dynamics and how this influence depends on the machine settings in the low momentum compaction regime, which are related to the bunch length changes.
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