Paper | Title | Page |
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WEPPR049 | The Impact of Fill Patterns on the Fast Ion Instability in the ILC Damping Ring | 3036 |
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The ions produced via collisional ionization of the residual gas molecules in vacuum pipe with the circulating electron beam have deleterious effect on the beam properties and may become a limiting factor in the machine’s performance. In this paper, the various beam fill patterns are investigated and their effects on the fast ion instability are discussed. The simulations show that an optimal fill pattern can reduce growth rate of the fast ion instability significantly. | ||
WEPPR050 | Future Colliders Based on a Modulated Proton Bunch Driven Plasma Wakefield Acceleration | 3039 |
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Recent simulation shows that a self-modulated high energy proton bunch can excite large amplitude plasma wakefields and accelerate an external electron bunch to higher energies*. Based on this scheme, future colliders, either an electron-positron linear collider (e+e− collider) or an electron-hadron collider (e.g. LHeC) can be conceived. In this paper, we discuss some key design issues for an e+e− collider and a high energy LHeC collider, based on the existing infrastructure of the CERN accelerator complex.
* A. Caldwell, K. Lotov, Plasma wakefield acceleration with a modulated proton bunch, arXiv: 1105.1292 (2011). |
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