ERA

Download the full-sized PDF of Relativistic Self-Focusing, Magnetic Field Generation and Particle Acceleration in Underdense PlasmasDownload the full-sized PDF

Analytics

Share

Permanent link (DOI): https://doi.org/10.7939/R35H8M

Download

Export to: EndNote  |  Zotero  |  Mendeley

Communities

This file is in the following communities:

Graduate Studies and Research, Faculty of

Collections

This file is in the following collections:

Theses and Dissertations

Relativistic Self-Focusing, Magnetic Field Generation and Particle Acceleration in Underdense Plasmas Open Access

Descriptions

Other title
Subject/Keyword
Channelling
Particle Acceleration
Underdense Plasmas
Magnetic Field Generation
Type of item
Thesis
Degree grantor
University of Alberta
Author or creator
Naseri, Neda
Supervisor and department
Rozmus, Wojciech (Physics)
Examining committee member and department
Rozmus, Wojciech (Physics)
Sydora, Richard (Physics)
Fedosejevs, Robert (Electrical and Computer Engineering)
Morsink, Sharon (Physics)
Pesme, Denis (Physics, Ecole Polytechnique, France )
Department
Department of Physics
Specialization

Date accepted
2010-09-29T19:21:56Z
Graduation date
2010-11
Degree
Doctor of Philosophy
Degree level
Doctoral
Abstract
In this thesis the following problems are studied: 1-Relativistic self-focusing and channelling of intense laser pulses have been studied in underdense plasma using 2D PIC simulations, for different laser powers and plasma densities. Analytical solutions for the stationary evacuated channels have been recovered in PIC simulations. It is shown that otherwise stable channels can accelerate electrons due to surface waves on the walls of the channels. Relativistic filaments with finite electron density are unstable to transverse modulations which lead in the nonlinear stage to the break-up of laser pulses into independent filaments. 2-Although 3D simulations are limited, they are more realistic. Azimuthal stability of the laser pulses in interaction with underdense plasma can only be studied in 3D geometry. Relativistic self-focusing and channelling of intense laser pulses have been studied in underdense plasma using 3D PIC simulations, for different laser powers and plasma densities. Analytical solutions for the stationary evacuated channels and ring structure have been recovered in PIC simulations. The stability of ring structure due to azimuthal perturbations has been studied both in theory and in simulations. The gain length of such instability is smaller at higher densities $(>0.1n_{cr})$. It is shown that the azimuthal perturbation can break up the azimuthal symmetry of the laser pulse. 3-Working with circularly polarized laser pulses, gave us a motivation to study Inverse Faraday Effect in interaction of circularly polarized laser pulses with plasma. Axial magnetic field generation by intense circularly polarized laser beams in underdense plasmas has been studied with 3D particle-in-cell (PIC) simulations and by means of theoretical analysis. The source of azimuthal nonlinear currents and of the axial magnetic field depends on the transverse inhomogeneities of the electron density and laser intensity. The fields reach maximum strength of several tens of MG for laser pulses undergoing relativistic self-focusing and channelling in moderately relativistic regime. 4-Electron wakefield acceleration was studied in support of the experiment which was carried on using 7 TW laser beam at Canadian Advanced Laser Light source facility. 2D simulations were performed to study this problem. The energy the electrons gained in the process was peaked at 20-30 Mev close to the experimental results.
Language
English
DOI
doi:10.7939/R35H8M
Rights
License granted by Neda Naseri (nnaseri@ualberta.ca) on 2010-09-28T18:03:36Z (GMT): Permission is hereby granted to the University of Alberta Libraries to reproduce single copies of this thesis and to lend or sell such copies for private, scholarly or scientific research purposes only. Where the thesis is converted to, or otherwise made available in digital form, the University of Alberta will advise potential users of the thesis of the above terms. The author reserves all other publication and other rights in association with the copyright in the thesis, and except as herein provided, neither the thesis nor any substantial portion thereof may be printed or otherwise reproduced in any material form whatsoever without the author's prior written permission.
Citation for previous publication

File Details

Date Uploaded
Date Modified
2014-05-01T04:07:49.707+00:00
Audit Status
Audits have not yet been run on this file.
Characterization
File format: pdf (Portable Document Format)
Mime type: application/pdf
File size: 9919096
Last modified: 2015:10:12 16:36:49-06:00
Filename: Naseri_Neda_Fall2010.pdf
Original checksum: 7567d1abc35fee629302c616a1e2099b
Well formed: false
Valid: false
Status message: Lexical error offset=9863855
Page count: 172
Activity of users you follow
User Activity Date