Experimental measurement of nonlinear plasma wake fields

Experimental measurement of nonlinear plasma wake fields.

We report direct high resolution observation of nonlinear steepened plasma waves excited in the wake of an intense, self-pinched electron beam. Oscillations in both accelerating and deflecting fields are measured, and analyzed in the context of linear and nonlinear plasma wave theory. The degree of nonlinearity in the wakr-fields is shown to be consistent with analytical predictions of the beam...

Nonlinear Two - Dimensional Potential Plasma Wake Waves

The condition for potential description of the wake waves, generated by flat or cylindrical driving electron bunch in cold plasma is derived. The two-dimensional nonlinear equation for potential valid for small values of that is obtained and solved by the separation of variables. Solutions in the form of cnoidal waves,existing behind the moving bunch at small values of vertical coordinate,are o...

One Dimensional Nonlinear Wake-fields Excited in a Cold Plasma by Charged Bunches

One dimensional nonlinear plasma wake-fields excited by a single bunch and by series of bunches are considered. Essential differences are brought to light between negatively charged bunch case and positively one. The bunches with nonuniform distributions of density are investigated. The obtained results shows dependence of excited potential electric fields on bunches parameters and allows to ch...

Two - dimensional Stationary Wake Fields in Vortexfree Cold Plasma

Simulations of Electron Injection into Plasma Wake Fields by Colliding Laser Pulses Using Xoopic

First time, self-consistent particle-in-cell simulations of electron injection into a plasma wake field by colliding laser pulses are presented. This method for injecting electrons in a laser wake field has been proposed recently by Esarey and coworkers [1]. An intense pump pulse generates a fast wake field. Forward going and backward going injection pulses collide at some distance behind the p...