Abstract
Three-dimensional particle-in-cell (PIC) simulations with the code QuickPIC are used to illustrate the typical accelerating structures associated with the interaction of an intense laser beam with an underdense plasma in the blowout regime. Our simulations are performed with an externally injected electron beam, which is positioned in the region of maximum accelerating gradients. As the laser propagates in the plasma, an almost complete electron cavitation occurs, leading to the generation of accelerating fields in excess of 1 GeV/cm.
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