Wake fields effects in dielectric capillary
Plasma wake-field acceleration experiments are performed at the SPARC_LAB test facility by using a gas-filled capillary plasma source composed of a dielectric capillary. The electron can reach GeV energy in a fewcentimeters, with an accelerating gradient orders of magnitude larger than provided by conventional techniques.In this acceleration scheme, wake fields produced by passing electron beams through dielectric structures candetermine a strong beam instability that represents an important hurdle towards the capability to focus high-current electron beams in the transverse plane.