Influences of harmonic cavities on single-bunch instabilities in electron storage rings

• 作者: Hai-Sheng Xu Jing-Ye Xu Na Wang
• 来源期刊: 核技术（英文版）
• 年，卷（期）: 2021,（9）
• 所属期刊栏目: SYNCHROTRON RADIATION TECHNOLOGY AND APPLICATIONS
• 页码范围: 1-8
• 页数: 8页
• 语种: 英文

摘要

Harmonic cavities (HCs) are widely used in electron storage rings, mainly to increase the Touschek lifetime by lengthening bunches. HCs have become critical components of almost all fourth-generation synchrotron light sources. In addition to the benefits of increasing the Touschek lifetime, they also affect the collective beam instabilities in electron storage rings. However, the influ-ence of HC settings on collective beam instabilities is still not well understood. HCs are typically designed to operate under so-called ideal lengthening conditions, which do not necessarily optimize the suppression of collective beam instabilities. We therefore extended earlier studies of col-lective beam instabilities to consider more general HC settings. We present preliminary studies and analyses of the influences of different HC settings on microwave and transverse mode-coupling instabilities.