Predominant Contribution of Direct Laser Acceleration to High-Energy Electron Spectra in a Low-Density Self-Modulated Laser Wakefield Accelerator

P. M. King, K. Miller, N. Lemos +12

The two-temperature relativistic electron spectrum from a low-density ($3\times 10^{17}$~cm${}^{-3}$) self-modulated laser wakefield accelerator (SM-LWFA) is observed to transition be…