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Ultracold electron bunch generation via plasma photocathode emission and acceleration in a beam-driven plasma blowout
B Hidding1, G Pretzler, J B Rosenzweig
1Department of Physics and Astronomy, University of California Los Angeles, Los Angeles, California 90095, USA.
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.
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