Efficiency and Energy Spread in Laser-Wakefield Acceleration

A. J. W. Reitsma, R. A. Cairns, R. Bingham, D. A. Jaroszynski
2005 Physical Review Letters  
The theoretical limits on efficiency and energy spread of the laser-wakefield accelerator are investigated using a one-dimensional model. Modifications, both of the wakefield due to the electron bunch, and of the laser pulse shape due to the varying permittivity of the plasma, are described self-consistently. It is found that a short laser pulse gives a higher efficiency than a long laser pulse with the same initial energy. Energy spread can be minimized by optimizing bunch length and bunch
more » ... ength and bunch charge such that the variation of the accelerating force along the length of the bunch is minimized. An inherent trade-off between energy spread and efficiency exists.
doi:10.1103/physrevlett.94.085004 pmid:15783901 fatcat:zateewoqbze4hdcqfitbc44wwa