Fig. 2: Collision of e−/e+ bunch with laser pulse.
From: Broadband coherent XUV light from e−/e+ microbunching in an intense laser pulse
From simulations with our point particle code: a spectrum of energy radiated onto 1 cm2 detector at 1 m distance along + z from the collision region, with first harmonic ω1 ≈ 23 eV. b Bunch compression at laser pulse peak. c Attosecond pulse train observed at detector. d Properties of the attosecond pulses and their temporal separation Δtdet ≈ 92 as. e Spectrum of incoherent energy radiated onto detector; field configurations are overlapping and indistinguishable. f Spectral phase of radiation. g Residual spectral phase. h Group delay dispersion evaluated from the polynomial fit in (g). Legends in (e, g) apply to all plots. The bunch, compressed by the interaction with its own radiation, produces coherent XUV light in the form of an attosecond pulse train with a stable spectral phase.
