title: Ultracold electron bunch generation via plasma photocathode emission and acceleration in a beam-driven plasma blowout.
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.
authors.affiliation: Department of Physics and Astronomy, University of California Los Angeles, Los Angeles, California 90095, USA.
authors.forename: B
authors.initials: B
authors.lastname: Hidding
authors.forename: G
authors.initials: G
authors.lastname: Pretzler
authors.forename: J B
authors.initials: JB
authors.lastname: Rosenzweig
authors.forename: T
authors.initials: T
authors.lastname: Königstein
authors.forename: D
authors.initials: D
authors.lastname: Schiller
authors.forename: D L
authors.initials: DL
authors.lastname: Bruhwiler