| Paper |
Title |
Page |
| TUP54 |
Resistive-Wall Wake Effect in the Beam Delivery System
|
393 |
| |
- J. Wu
SLAC, Menlo Park, California
- J. R. Delayen
Jefferson Lab, Newport News, Virginia
- T.O. Raubenheimer
SLAC/NLC, Menlo Park, California
- J.-M. Wang
BNL/NSLS, Upton, Long Island, New York
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The resistive wall instability is investigated in the context of the final beam delivery system of linear colliders. The emittance growth is calculated analytically and compared against the results of full numerical simulations. Criteria for the design of final beam delivery systems are developed.
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| TUP56 |
Simulation of RF Breakdown Effects on NLC Beam
|
396 |
| |
- V.A. Dolgashev
SLAC/ARDB, Menlo Park, California
- T.O. Raubenheimer
SLAC/NLC, Menlo Park, California
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The linacs of the Next Linear Collider (NLC) will contain several thousand traveling wave X-Band accelerator structures operating at input power of about 60 MW. At this input power prototypes of NLC structures have breakdown rates lower than one breakdown in ten hours. RF breakdowns disrupt flow of energy inside the structure and create arcs with electron and ion currents. Electromagnetic fields of these currents interact with the NLC beam. We simulated deflection of the NLC beam caused by breakdown currents using the particle-in-cell code MAGIC. In this paper we present modeling considerations and simulation results.
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| THP37 |
Approaches to Beam Stabilization in X-Band Linear Colliders
|
687 |
| |
- J. Frisch, L. Hendrickson, T. Markiewicz, A. Seryi
SLAC, Menlo Park, California
- P. Burrows, S. Molloy, G. White
Queen Mary University of London, London
- C. Perry
OXFORDphysics, Oxford, Oxon
- T.O. Raubenheimer, T. Thomas
SLAC/NLC, Menlo Park, California
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In order to stabilize the beams at the interaction point, the X-band linear collider proposes to use a combination of techniques: inter-train and intra-train beam-beam feedback, passive vibration isolation, and active vibration stabilization based on either accelerometers or laser interferometers. These systems operate in a technologically redundant fashion: simulations indicate that if one technique proves unusable in the final machine, the others will still support adequate luminosity. Experiments underway for all of these technologies, have already demonstrated adequate performance.
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