The filamented electron bunch of the bubble regime
arXiv:1903.04858 · doi:10.1017/S0263034620000130
Abstract
We present a theory for describing the inner structure of the electron bunch in the bubble regime starting from a random distribution of electrons inside the bubble and subsequently minimizing the system's energy. Consequently, we find a filament-like structure in the direction of propagation that is surrounded by various shells consisting of further electrons. If we specify a 2D initial structure, we observe a hexagonal structure for a high number of particles, corresponding to the close-packing of spheres in two dimensions. The two-dimensional structures are in agreement with the equilibrium slice model (ESM).
arXiv comment7 pages, 9 figures; version 2 with improved figures and references to similar results in conventional accelerators
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