scholarly journals INCREASE OF EFFICIENCY OF ACCELERATION OF THE TEST ELECTRON BUNCH BY SEQUENCE OF ELECTRON BUNCHES IN THE RECTANGULAR DIELECTRIC RESONATOR AT PLASMA FILLING

2019 ◽  
pp. 53-57
Author(s):  
P.I. Markov ◽  
I.N. Onishchenko ◽  
G.V. Sotnikov
Keyword(s):  
Numerical Simulation ◽  
Electric Field ◽  
Relativistic Electron ◽  
Plasma Density ◽  
Dielectric Resonator ◽  
Electron Bunch ◽  
Linear Growth ◽  
Energy Gain ◽  
Electron Bunches ◽  
Test Electron

A result of numerical simulation of acceleration of the test electron bunch following a sequence of relativistic electron bunches in the rectangular dielectric resonator when filling the drift channel with plasma of different density is provided. We have found out that at change of plasma density the linear growth of energy gain of test bunch electrons is observed. It is connected with structure ordering of longitudinal accelerating electric field in the resonator and also with increase in its amplitude. It is due to that at periodic injection of drive bunches on resonator axis the areas with the increased plasma electrons density are formed.

scholarly journals Laser wake field acceleration with controlled self-injection by sharp density transition

2004 ◽  
Vol 22 (4) ◽  
pp. 423-429 ◽  
Author(s):  
P. TOMASSINI ◽  
M. GALIMBERTI ◽  
A. GIULIETTI ◽  
D. GIULIETTI ◽  
L.A. GIZZI ◽  
...  
Keyword(s):  
Relativistic Electron ◽  
Plasma Density ◽  
Electron Bunch ◽  
Energetic Particles ◽  
Energy Spread ◽  
Promising Method ◽  
Acceleration Phase ◽  
Wake Field ◽  
Electron Bunches ◽  
Thin Foils

Laser Wake Field Acceleration of relativistic electron bunches is a promising method to produce a large amount of energetic particles with table top equipment. One of the possible methods to inject particles in the appropriate acceleration phase of the wake behind the pulse takes advantage of the partial longitudinal breaking of the wake crests across a density downramp. In this paper results of 2.5D PIC simulations, showing the production of an electron bunch with reduced energy spread, are reported. Also, a possible method to produce the required plasma density transition by laser explosion of a suitable couple of thin foils is discussed.

scholarly journals WAKEFIELDS AND DRIVE ELECTRON BUNCHES DYNAMICS IN THREE-ZONE DIELECTRIC RESONATOR AT ASYMMETRICAL INJECTION

2019 ◽  
pp. 58-62
Author(s):  
K.V. Galaydych ◽  
R.R. Kniaziev ◽  
G.A. Krivonosov ◽  
I.N. Onishchenko ◽  
G.V. Sotnikov
Keyword(s):  
Spatial Distribution ◽  
Relativistic Electron ◽  
Dielectric Resonator ◽  
Numerical Study ◽  
Particle Dynamics ◽  
Axial Injection ◽  
Electron Bunches

A numerical study of the wakefield excitation in a rectangular dielectric-loaded resonator by a sequence of relativistic electron bunches in the case of non-axial injection is carried out. The effect of the shift of injected bunches on the particle dynamics, as well as on the spatial distribution of the components of the bunch-excited fields, is studied. The current losses of a sequence of relativistic electron bunches due to the particles deposition on the surface of the dielectric is determined.

scholarly journals TRANSITION EXCITATION OF A PERFECTLY CONDUCTING CYLINDER BY RELATIVISTIC ELECTRON BUNCHES

2021 ◽  
pp. 96-101
Author(s):  
V.A. Balakirev ◽  
I.N. Onishchenko
Keyword(s):  
Field Strength ◽  
Electromagnetic Radiation ◽  
Relativistic Electron ◽  
Electron Bunch ◽  
Transition Radiation ◽  
Cylinder Surface ◽  
Wave Zone ◽  
Electron Bunches ◽  
Conducting Cylinder

Transition radiation of a relativistic electron bunch, which arises when it collides with the surface of an infinite perfectly conducting cylinder, is considered. The electron bunch moves perpendicular to the cylinder surface. Expressions for the field strength of electromagnetic radiation in the wave zone are obtained and investigated.

scholarly journals HOMOGENEOUS FOCUSING FIELD FOR SHORT RELATIVISTIC ELECTRON BUNCHES IN PLASMA

2020 ◽  
pp. 68-72
Author(s):  
V.I. Maslov ◽  
I.P. Levchuk ◽  
D.S. Bondar ◽  
I.N. Onishchenko
Keyword(s):  
Numerical Simulation ◽  
Relativistic Electron ◽  
Electron Bunches

Plasma wake lens in which all short relativistic electron bunches of sequence are focused identically and uniformly is studied analytically and by numerical simulation. For two types of lenses necessary parameters of focused sequence of relativistic electron bunches are formulated. Verification of these parameters is performed by numerical simulation.

scholarly journals Electron acceleration by high current-density relativistic electron bunch in plasmas

2007 ◽  
Vol 25 (2) ◽  
pp. 313-319 ◽  
Author(s):  
C.T. ZHOU ◽  
M.Y. YU ◽  
X.T. HE
Keyword(s):  
Relativistic Electron ◽  
Electron Bunch ◽  
High Current Density ◽  
Electron Acceleration ◽  
High Energy ◽  
Energy Gain ◽  
Small Scale ◽  
High Current ◽  
Particle In Cell ◽  
Very High Energy

Electron acceleration by a short high-current relativistic electron bunch (EB) in plasmas at three characteristic densities is studied by particle-in-cell simulation. It is found that if the EB is appropriately matched to the background plasma, the blowout space-charge field of the EB can accelerate the trailing bunch electrons at very high energy gain rate. This high energy gain, as well as the large-amplitude wakefield, the turbulent small-scale electron plasma waves, and the formation of large current peaks, are studied. The evolution of the EB, its blowout field, and other related parameters are shown to be self-similar.

scholarly journals DEPENDENCE OF WAKEFIELD EXCITATION IN PLASMA BY NON-RESONANT SEQUENCE OF ELECTRON BUNCHES ON THEIR LENGTHS

2021 ◽  
pp. 65-69
Author(s):  
D.S. Bondar ◽  
A.P. Boychenko ◽  
V.I. Maslov ◽  
I.N. Onishchenko ◽  
R.T. Ovsiannikov
Keyword(s):  
Numerical Simulation ◽  
Growth Rate ◽  
Relativistic Electron ◽  
Maximum Growth ◽  
Maximum Growth Rate ◽  
Electron Bunches

The present paper describes the results of numerical simulation (using 2d3v code LCODE) of the regime, when the wakefield is excited at maximum growth rate in the plasma by a nonresonant sequence of relativistic electron bunches. As a result, the wakefield increases approximately in steps. The paper gives the parameters, at which this regime is achieved. It is shown that for smaller bunch radii, the amplitude of the excited wakefield is larger. At long lengths of the bunches, the amplitude of the wakefield is larger, in contrast to the excitation by the resonant sequence of bunches.

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