Simulation of the fast ion instability in SSRF storage ring

TL;DR

This paper simulates the fast ion instability in SSRF storage ring using a weak-strong code, demonstrating that mini-train fill patterns effectively suppress the instability's growth.

Contribution

It introduces a simulation approach for fast ion instability in SSRF and evaluates the effectiveness of different fill patterns in suppression.

Findings

Mini-train fill patterns suppress fast ion instability growth

Simulation results match observed instability behavior

Gas pressure influences instability development

Abstract

Fast ion instability has been observed in the early commissioning and operation of the Shanghai Synchrotron Radiation Facility (SSRF) storage ring. In this paper, a weak-strong code is used to simulate the fast ion instability in SSRF storage ring. Various fill patterns and gas pressures are investigated. The results show that the mini-train fill patterns are very effective to suppress the growth of the fast ion instability.