Transient Beam Loading in the Diamond Storage Ring

Authors: S. De Santis (LBNL, Berkeley, USA) , J. M. Byrd (LBNL, Berkeley, USA) , R. Bartolini (Diamond Light Source)
Co-authored by industrial partner: No

Type: Conference Paper
Conference: Tenth European Particle Accelerator Conference (EPAC '06)
Peer Reviewed: No

State: Published (Approved)
Published: June 2006

Abstract: Harmonic cavity systems have been installed on several 3rd generation light sources to lengthen the bunches and increase the Touschek lifetime. Apart from this beneficial effect, harmonic cavities are known to increase the transient beam loading in high-current machines, due to the presence of gaps in the fill pattern. The amplitude of this effect, which is substantially larger than that caused by the main RF system, can in turn produce considerable variations in bunch length and phase along the train, which result in a significant reduction of the lifetime increase. We have developed a tracking simulation, which we have applied to the analysis of the beam loading transients in Diamond, for the case of passive superconducting harmonic cavities. The influence of beam current, gap amplitude and harmonic cavity tuning on the final lifetime have been studied, as well as the effects of different coupling factors.

Subject Areas: Engineering

Technical Areas: Accelerator Physics

Added On: 18/11/2010 11:16

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