| Paper |
Title |
Page |
| MOP066 |
Wake Fields and Beam Dynamics Simulations for the 3.9-GHz Cavities of the ILC
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196 |
| |
- R. M. Jones
UMAN, Manchester
- L. Bellantoni
Fermilab, Batavia, Illinois
- G. Burt, A. C. Dexter
Cockcroft Institute, Lancaster University, Lancaster
- A. Latina, D. Schulte
CERN, Geneva
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Crab cavities are used for the ILC in order to increase the luminosity of the colliding beams. These cavities operate at the 3rd harmonic of the accelerating frequency (1.3GHz). We study the LOM (Lower Order Modes) and HOM (Higher Order Modes) excited by the beam. The corresponding wake field is calculated and simulations are conducted on the beam dynamics of the interaction of the wake field with the multi-bunch beam train.
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| MOP067 |
Higher Order Mode Wakefield Simulations and Beam Dynamics Simulations in the ILC Main Linacs
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199 |
| |
- R. M. Jones, C. J. Glasman
UMAN, Manchester
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The progress of approximately 3000 electron (and positron) bunches down the main linacs of the ILC (International Linear Collider) can readily give rise to dipole modes which distrupt the progress of the beam. We investigate the transverse modes which are excited and monitor the resulting emittance dilution which occurs down the linac. At present there are two design configurations for the ILC: the BCD (Baseline Configuration Design) and the ACD (Alternate Configuration Design). We investigate the wake fields and beam dynamics for both configurations. In particular, the influence of trapped modes on the emittance of the beam is studied.
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| TUP019 |
Resistive Wall Wake Fields in the High-Frequency AC Conductivity Regime
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289 |
| |
- R. M. Jones
UMAN, Manchester
- J. A. Clarke, D. J. Scott
Cockcroft Institute, Warrington, Cheshire
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We investigate the resistive wall wake fields in both the main L-band linacs and positron source undulators of the ILC (International Linear Collider). The influence of a.c. conductivity on the beam impedance is studied in both systems. We focus on the influence of high frequencies on the impedance and the corresponding wake field. We include effects due the classical skin depth, anomalous skin depth, and the extreme anomalous skin depth. The wake field and corresponding energy spread induced in the beam is simulated for all three regimes.
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