Fast-electron self-collimation in a plasma density gradient

Fast-electron self-collimation in a plasma density gradient

Laser-driven fast electron collimation in targets with resistivity boundary.

We demonstrate experimentally that the relativistic electron flow in a dense plasma can be efficiently confined and guided in targets exhibiting a high-resistivity-core-low-resistivity-cladding structure analogous to optical waveguides. The relativistic electron beam is shown to be confined to an area of the order of the core diameter (50 μm), which has the potential to substantially enhance th...

Collimation with hollow electron beams.

A novel concept of controlled halo removal for intense high-energy beams in storage rings and colliders is presented. It is based on the interaction of the circulating beam with a 5-keV, magnetically confined, pulsed hollow electron beam in a 2-m-long section of the ring. The electrons enclose the circulating beam, kicking halo particles transversely and leaving the beam core unperturbed. By ac...

Electron Lenses for Particle Collimation in Lhc

Electron Lenses built and installed in Tevatron have proven themselves as safe and very reliable instruments which can be effectively used in hadron collider operation for a number of applications, including compensation of beam-beam effects [1], DC beam removal from abort gaps [2], as a diagnostic tool. In this presentation we – following original proposal [3] – consider in more detail a possi...

SELF-INJECTION BY TRAPPING OF PLASMA e− OSCILLATING IN RISING DENSITY GRADIENT AT THE VACCUUM-PLASMA INTERFACE

We model the trapping of plasma e− within the density structures excited by a propagating energy source (βS ' 1) in a rising plasma density gradient. Rising density gradient leads to spatially contiguous coupled up-chirped plasmons (dωpe (x)/dx > 0). Therefore phase mixing between plasmons can lead to trapping until the plasmon field is high enough such that e− trajectories returning towards a ...