The Effects of a Density Mismatch in a Two-State LWFA
Mar, 2011
3 pages
Part of Particle accelerator. Proceedings, 24th Conference, PAC'11, New York, USA, March 28-April 1, 2011
Published in:
- Conf.Proc.C 110328 (2011) 1421-1423
Contribution to:
Report number:
- PAC-2011-WEOBS3
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Abstract:
A two-stage Laser Wakefield Accelerator (LWFA) has been developed, which utilizes the ionization induced injection mechanism to produce high energy, narrow energy spread electron beams when the electron density is equal in both stages. Howeve r, when the densities are not equal these high quality beams are not observed. As the electron density varies across the interface between the adjacent stages the size of the ion cavity is expected to change; this results in either a reduction of the peak electron energy (for a density decrease), or in the exclusion of previously trapped charge from the first wake period (for a density increase). The latter case can be overcome if the interaction length before the density interface exceeds a threshold det ermined by the densities in each stage, and may provide a mechanism for enhanced energy gain.References(0)
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