Nonlinear and collective phenomena observed in plasma wakefield acceleration driven by multiple bunches
- NERL or RCNS, The University of Tokyo, Tokai-mura, Naka-gun, Ibaraki-ken (Japan)
- National Laboratory for High Energy Physics (KEK), Tsukuba (Japan)
- ISIR, Osaka University, Mihogaoka, Ibaragi (Japan)
- EEE Department, Utsunomiya University, Ishii-machi, Utsunomiya (Japan)
Electron acceleration by plasma wakefields driven by multiple bunches was experimentally studied. It is expected that a wakefield driven by each bunch builds up to result in a large acceleration gradient. However, the build-up of wakefields was not ideal, due to the peaked plasma-density distribution in a small plasma chamber. Two puzzles were encountered. First, the amplitude of the wakefield observed was larger than that calculated based on a linear model. The observed wake structure was not sinusoidal. These results suggest that the plasma wave was nonlinear in spite of the fact that the perturbation of a plasma by the wave should be far smaller than unity. Second, a quadratic deformation was found in the shape of test beams; when it was focused transversely, it was defocused longitudinally, and vice versa. This contradicts the theory that the plasma-lens effect is uniform. {copyright} {ital 1997 American Institute of Physics.}
- OSTI ID:
- 574609
- Report Number(s):
- CONF-9609198-; ISSN 0094-243X; TRN: 98:002674
- Journal Information:
- AIP Conference Proceedings, Vol. 395, Issue 1; Conference: 12. advanced ICFA beam dynamics workshop on nonlinear and collective phenomena in beam physics, Arcidosso (Italy), 2-6 Sep 1996; Other Information: PBD: Feb 1997
- Country of Publication:
- United States
- Language:
- English
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