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Multi-color γ-rays from comb-like electron beams driven by incoherent stacks of laser pulses
Trains of fs-length, GeV-scale electron bunches with controlled energy spacing and a 5-D brightness up to 10 17 A/m 2 may be produced in a mm-scale uniform plasma. The main element of the scheme is an incoherent stack of 10-TW-scale laser pulses of different colors, with mismatched focal spots, with the highest-frequency pulse advanced in time. While driving an electron density bubble, this stack remains almost proof against nonlinear red-shift and self-compression. As a consequence, thedoi:10.1063/1.4975899 fatcat:c4wcagcsdngrnebb4utttbelbi