title: Note: matching index technique for avoiding Higher Order Mode resonance in accelerators: INDUS-2 accelerator as a case study.
abstract: Resonance between circulating beam frequencies and RF cavity Higher Order Modes (HOMs) of accelerators can lead to coupled-bunch instabilities. Shifting these HOMs to avoid the resonance is a topic of active interest. A study has been carried out for the accelerating cavities of the INDUS-2. For quantitative measure of deciding which modes have to be moved and by how much, we introduce a new index called the matching index (IM), as a measure of how close a HOM is to the nearest beam mode. Depending on the value of IM, the operating scenarios are classified as safe and unsafe.
authors.affiliation: Raja Ramanna Centre for Advanced Technology, RRCAT, Indore 452013, India.
authors.forename: V
authors.initials: V
authors.lastname: Jain
authors.forename: U V
authors.initials: UV
authors.lastname: Bhandarkar
authors.forename: S C
authors.initials: SC
authors.lastname: Joshi
authors.forename: S
authors.initials: S
authors.lastname: Krishnagopal