Filling Pattern Dependence of Regenerative Beam Breakup Instability in Energy Recovery Linacs
| Autor: | Sadiq Setiniyaz, Peter Williams, Robert Apsimon |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Limiting factor
Physics Accelerator Physics (physics.acc-ph) Nuclear and High Energy Physics Energy recovery Physics and Astronomy (miscellaneous) 010308 nuclear & particles physics FOS: Physical sciences Particle accelerator QC770-798 Surfaces and Interfaces Mechanics Breakup 01 natural sciences Instability law.invention law Nuclear and particle physics. Atomic energy. Radioactivity 0103 physical sciences Physics - Accelerator Physics Current (fluid) 010306 general physics Beam (structure) Energy recovery linac |
| Zdroj: | Physical Review Accelerators and Beams, Vol 24, Iss 6, p 061003 (2021) |
| DOI: | 10.48550/arxiv.2104.13418 |
| Popis: | Beam breakup instability is a potential issue for all particle accelerators and is often the limiting factor for the maximum beam current that can be achieved. This is particularly relevant for Energy Recovery Linacs with multiple passes where a relatively small amount of charge can result in a large beam current. Recent studies have shown that the choice of filling pattern and recirculation scheme for a multi-pass energy recovery linac can drastically affect the interactions between the beam and RF system. In this paper we further explore this topic to study how filling patterns affect the beam breakup instability and how this can allow us to optimise the design in order to minimise this effect. We present a theoretical model of the beam-RF interaction as well as numerical modeling and show that the threshold current can vary by factors of 2-4, and potentially even more depending on the machine design parameters. Therefore a judicious choice of filling pattern can greatly increase the onset of BBU, expanding the utility of future ERLs. Comment: 10 pages, 10 figures, submitted to Physical Review Accelerators and Beams on 27th, April, 2021 |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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