| Paper | Title | Page |
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| TUPAC07 | Beam Dynamics and Wakefield Suppression in Interleaved Damped and Detuned Structures for CLIC | 460 |
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Acceleration of multiple bunches of charged particles in the main linacs of the Compact Linear Collider (CLIC) is disrupted due self-excited wakefields. The CLIC baseline design uses heavy damping of the modes which constitute the wakefield (Q~10). In this damping scheme only the wake from the immediately preceding bunch has a significant impact on the projected emittance and figures of merit to ensure an acceptable emittance dilution are discussed in *. Here we discuss an alternative damping scheme based on the experience of the NLC **. The wakefield suppression is provided by a strong detuning and moderate damping (Q~700) by 4 manifolds which are slot-coupled to each cell. Interleaving neighboring structure frequencies helps to enhance wakefield suppression. In this damping scheme it is the total wake distribution produced by the whole bunch train which has an impact on the projected emittance. We use the beam tracking code PLACET to analyze the stability of the full system made of more than 71,000 structures, over a relatively large number of slightly different machines and the influence of random frequency errors also be incorporated.
* D. Schulte, CLIC-Note-805, 2009 ** R. M. Jones, et. al, PRST-AB, 9, 102001, 2006 |
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