Phys. Rev. Lett. 100, 074802 (2008) [4 pages]High-Gradient Plasma-Wakefield Acceleration with Two Subpicosecond Electron BunchesReceived 12 October 2007; published 20 February 2008 A plasma-wakefield experiment is presented where two 60 MeV subpicosecond electron bunches are sent into a plasma produced by a capillary discharge. Both bunches are shorter than the plasma wavelength, and the phase of the second bunch relative to the plasma wave is adjusted by tuning the plasma density. It is shown that the second bunch experiences a 150 MeV/m loaded accelerating gradient in the wakefield driven by the first bunch. This is the first experiment to directly demonstrate high-gradient, controlled acceleration of a short-pulse trailing electron bunch in a high-density plasma. © 2008 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.100.074802
DOI:
10.1103/PhysRevLett.100.074802
PACS:
41.75.Lx, 41.75.Ht, 41.85.Ct, 52.40.Mj
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