Beam-driven plasma wakefield acceleration using low-ionization-threshold gas such as Li is combined with laser-controlled electron injection via ionization of high-ionization-threshold gas such as He. The He electrons are released with low transverse momentum in the focus of the copropagating, nonrelativistic-intensity laser pulse directly inside the accelerating or focusing phase of the Li blowout. This concept paves the way for the generation of sub-μm-size, ultralow-emittance, highly tunable electron bunches, thus enabling a flexible new class of an advanced free electron laser capable high-field accelerator. © 2012 American Physical Society.
- free electron laser
- photocathode emission
- ultracold electrons
Hidding, B., Pretzler, G., Rosenzweig, J. B., Königstein, T., Schiller, D., & Bruhwiler, D. L. (2012). Ultracold electron bunch generation via plasma photocathode emission and acceleration in a beam-driven plasma blowout. Physical Review Letters, 108(3), [035001 ]. https://doi.org/10.1103/PhysRevLett.108.035001