Abstract
Coherent spontaneous THz undulator radiation from dense electron bunches formed in laser-driven photo-injectors
Highlights
Short dense bunches formed in advanced photoinjectors can be effectively used for generation of powerful coherent spontaneous Doppler-frequency-up-shifted radiation
These are pre-modulation and energy chirping of bunches as well as using space charge of the bunch for stabilization of its longitudinal size due to development of Negative Mass Instability (NMI)
A developed 1D theory of evolution of moving layers and disks is confirmed with simulations based on General Particle Tracer (GPT) [3] as well as on original 3D space-frequency WB3D code [4]
Summary
Short dense bunches formed in advanced photoinjectors can be effectively used for generation of powerful coherent spontaneous Doppler-frequency-up-shifted radiation. Several methods have been proposed to weaken longitudinal Coulomb repulsion of electrons in bunches to significantly increase the radiation energy and frequency of such sources.
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