Work

Effects of space charge force on the beam-beam mode coupling instability

Year: 2024

Type: article

Abstract: Recent e + e − colliders operate with very low emittance and high current. The space-charge tune shift is not negligible in tau-charm and B factories. The vertical space-charge tune shift is on the order of 0.02–0.1 and is comparable to the synchrotron tune and the beam-beam tune shift. The beam-beam mode coupling instability has been studied with and without vacuum environment impedance. The mode coupling is influenced by the space-charge force, which exhibits similar characteristics to the beam-beam force. The combined effect of beam-beam, space charge, and vacuum environment impedance is discussed within the framework of the mode coupling theory. Strong-strong beam-beam simulation, considering the space-charge force and the impedance, are conducted to validate the theory and to study general cases such as asymmetric colliders. Published by the American Physical Society 2024

Source: Physical Review Accelerators and Beams

DOI: 10.1103/physrevaccelbeams.27.101001

Authors: Kazuhito Ohmi, Yuan Zhang

Institutions: High Energy Accelerator Research Organization, Institute of High Energy Physics

Language: English

Topic: Particle accelerators and beam dynamics

Subfield: Aerospace Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: diamond

Funders: Chinese Academy of Sciences, Institute of High Energy Physics

Award: G8748473540