Wakefields generated by electron beams passing through a waveguide loaded with a slightly dispersive active medium

Excitation of wakefields by relativistic electron bunches in the dielectric waveguide filled with radially inhomogeneous plasma

One of shortcomings of the dielectric wakefield accelerators (DWA) limiting the effective length of an acceleration is susceptibility of drive bunches to beam breakup (BBU) instability [1]. With the purpose to suppress this instability recently it has been proposed to fill the drift channel of dielectric structure with plasma of certain density [2]. The investigations of plasma DWA (PDWA) [2] w...

Wakefields Generated by a Tightly Focused Laser Beam

Wakefields generated by a tightly focused laser beam (w0 λp ≡ 2πc/ωp) are characterized by a region of total electron cavitation near the head of the laser pulse, followed by a highly localized region of high electron density. The accelerating field maximizes at a spot size significantly less than λp. The focusing fields are generally larger than the accelerating field, and exhibit complex phas...

Highly efficient electron vortex beams generated by nanofabricated phase holograms

Gigavolt per Meter Breakdown Limits on Wakefields Driven by Electron Beams in Dielectric Structures

M. C. Thompson, 2, ∗ H. Badakov, A. M. Cook, J. B. Rosenzweig, R. Tikhoplav, G. Travish, I. Blumenfeld, M. J. Hogan, R. Ischebeck, N. Kirby, R. Siemann, D. Walz, P. Muggli, A. Scott, and R. Yoder Department of Physics and Astronomy, University of California, Los Angeles, California, 90095, USA 2 Lawrence Livermore National Laboratory, Livermore, California, 94551, USA Stanford Linear Accelerato...

Nonlinear wake amplification by an active medium in a cylindrical waveguide using a modulated trigger bunch

Cerenkov wake amplification can be used as an accelerating scheme, in which a trigger bunch of electrons propagating inside a cylindrical waveguide filled with an active medium generates an initial wake field. Due to the multiple reflections inside the waveguide, the wake may be amplified significantly more strongly than when propagating in a boundless medium. Sufficiently far away from the tri...