| Paper |
Title |
Page |
| MOPLT176 |
Mechanism of Electron Multipacting with a Long Bunch Proton Beam
|
938 |
| |
- L. Wang, M. Blaskiewicz, J. Wei
BNL, Upton, Long Island, New York
- R.J. Macek
LANL/LANSCE, Los Alamos, New Mexico
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The mechanism of electron multipacting in long bunched proton machine has been quantitatively described by the electron energy gain and electron motion. Some important parameters related to electron multipacting are investigated in detail. It is proved that multipacting is sensitive to beam intensity, longitudinal beam profile shape and transverse beam size. Agreement is achieved among our analysis, simulation and experiment.
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| WEPLT169 |
Benchmark and Threshold Analysis of Longitudinal Microwave Instability in the PSR
|
2221 |
| |
- S.M. Cousineau, J.A. Holmes
ORNL/SNS, Oak Ridge, Tennessee
- C. Beltran, R.J. Macek
LANL/LANSCE, Los Alamos, New Mexico
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| |
A set of inductive inserts used to provide passive longitudinal space charge compensation in the Los Alamos Proton Storage Ring cause a strong microwave instability in the beam when the inductors are at room temperature. We use the ORBIT code to perform benchmarks of the microwave instability dynamics, including the mode spectrum and the instability growth time. Additionally, we analyze the experimental instability intensity threshold and compare it with the simulated threshold. For all parameters benchmarked, results of simulations are in good agreement with the experimental data.
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