Phys. Rev. ST Accel. Beams 12, 051302 (2009) [5 pages]Transverse emittance and current of multi-GeV trapped electrons in a plasma wakefield accelerator
Multi-GeV trapped electron bunches in a plasma wakefield accelerator (PWFA) are observed with normalized transverse emittance divided by peak current, ϵN,x/It, below the level of 0.2 μm/kA. A theoretical model of the trapped electron emittance, developed here, indicates that emittance scales inversely with the square root of the plasma density in the nonlinear “bubble” regime of the PWFA. This model and simulations indicate that the observed values of ϵN,x/It result from multi-GeV trapped electron bunches with emittances of a few μm and multi-kA peak currents. This article is available under the terms of the Creative Commons Attribution 3.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. © 2009 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevSTAB.12.051302
DOI:
10.1103/PhysRevSTAB.12.051302
PACS:
41.75.Ht, 41.75.Lx, 52.25.Jm, 52.40.Mj
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