Simulation study of fast ion instability in the ILC damping ring and PETRA III
G. Xia, K. Ohmi, E.Elsen
TL;DR
This paper simulates the fast ion instability in the ILC damping ring and PETRA III, analyzing effects of gas pressure, fill patterns, and feedback mechanisms on beam stability.
Contribution
It introduces a comprehensive simulation approach that considers beam dynamics, gas pressure variations, and feedback effects for the first time in these accelerators.
Findings
Fast ion instability varies with gas pressure and fill pattern.
Feedback mechanisms can mitigate instability effects.
Beam size is influenced by beta and dispersion functions.
Abstract
The fast ion instability is simulated in different gas pressures and fill patterns for the damping ring of the International Linear Collider (ILC) and PETRA III respectively. Beam size variation due to beta function and dispersion function change is taken into account. Feedback is also applied in the simulation.
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