Ultracold electron bunch generation via plasma photocathode emission and acceleration in a beam-driven plasma blowout

Hidding, B. and Pretzler, G. and Rosenzweig, J.B. and Königstein, T. and Schiller, D. and 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. ISSN 0031-9007

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    Abstract

    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.