Increasing energy coupling into plasma waves by tailoring the laser radial focal spot distribution in a laser wakefield accelerator

G. Genoud, M. S. Bloom, J. Vieira, M. Burza, Z. Najmudin, A. Persson, L. O. Silva, K. Svensson, C. G. Wahlström, S. P.D. Mangles

Research output: Contribution to journalArticleScientificpeer-review

4 Citations (Scopus)

Abstract

By controlling the focal spot quality with a deformable mirror, we are able to show that increasing the fraction of pulse energy contained within the central part of the focal spot, while keeping the total energy and central spot size constant, significantly increases the amount of energy transferred to the wakefield: Our measurements show that the laser loses significantly more laser energy and undergoes greater redshifting and that more charge is produced in the accelerated beam. Three dimensional particle in cell simulations performed with accurate representations of the measured focal spot intensity distribution confirm that energy in the wings of the focal spot is effectively wasted. Even though self-focusing occurs, energy in the wings of the focal spot distribution is not coupled into the wakefield, emphasising the vital importance of high quality focal spot profiles in experiments.

Original languageEnglish
Article number064501
JournalPhysics of Plasmas
Volume20
Issue number6
DOIs
Publication statusPublished - 1 Jun 2013
MoE publication typeNot Eligible

Fingerprint

Plasma waves
plasma waves
Particle accelerators
accelerators
Lasers
lasers
Mirrors
wings
energy
deformable mirrors
Experiments
self focusing
profiles
pulses
cells

Cite this

Genoud, G. ; Bloom, M. S. ; Vieira, J. ; Burza, M. ; Najmudin, Z. ; Persson, A. ; Silva, L. O. ; Svensson, K. ; Wahlström, C. G. ; Mangles, S. P.D. / Increasing energy coupling into plasma waves by tailoring the laser radial focal spot distribution in a laser wakefield accelerator. In: Physics of Plasmas. 2013 ; Vol. 20, No. 6.
@article{4c2a44d069e5471e8045322b1bdd867f,
title = "Increasing energy coupling into plasma waves by tailoring the laser radial focal spot distribution in a laser wakefield accelerator",
abstract = "By controlling the focal spot quality with a deformable mirror, we are able to show that increasing the fraction of pulse energy contained within the central part of the focal spot, while keeping the total energy and central spot size constant, significantly increases the amount of energy transferred to the wakefield: Our measurements show that the laser loses significantly more laser energy and undergoes greater redshifting and that more charge is produced in the accelerated beam. Three dimensional particle in cell simulations performed with accurate representations of the measured focal spot intensity distribution confirm that energy in the wings of the focal spot is effectively wasted. Even though self-focusing occurs, energy in the wings of the focal spot distribution is not coupled into the wakefield, emphasising the vital importance of high quality focal spot profiles in experiments.",
author = "G. Genoud and Bloom, {M. S.} and J. Vieira and M. Burza and Z. Najmudin and A. Persson and Silva, {L. O.} and K. Svensson and Wahlstr{\"o}m, {C. G.} and Mangles, {S. P.D.}",
year = "2013",
month = "6",
day = "1",
doi = "10.1063/1.4810795",
language = "English",
volume = "20",
journal = "Physics of Plasmas",
issn = "1527-2419",
publisher = "American Institute of Physics AIP",
number = "6",

}

Genoud, G, Bloom, MS, Vieira, J, Burza, M, Najmudin, Z, Persson, A, Silva, LO, Svensson, K, Wahlström, CG & Mangles, SPD 2013, 'Increasing energy coupling into plasma waves by tailoring the laser radial focal spot distribution in a laser wakefield accelerator', Physics of Plasmas, vol. 20, no. 6, 064501. https://doi.org/10.1063/1.4810795

Increasing energy coupling into plasma waves by tailoring the laser radial focal spot distribution in a laser wakefield accelerator. / Genoud, G.; Bloom, M. S.; Vieira, J.; Burza, M.; Najmudin, Z.; Persson, A.; Silva, L. O.; Svensson, K.; Wahlström, C. G.; Mangles, S. P.D.

In: Physics of Plasmas, Vol. 20, No. 6, 064501, 01.06.2013.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Increasing energy coupling into plasma waves by tailoring the laser radial focal spot distribution in a laser wakefield accelerator

AU - Genoud, G.

AU - Bloom, M. S.

AU - Vieira, J.

AU - Burza, M.

AU - Najmudin, Z.

AU - Persson, A.

AU - Silva, L. O.

AU - Svensson, K.

AU - Wahlström, C. G.

AU - Mangles, S. P.D.

PY - 2013/6/1

Y1 - 2013/6/1

N2 - By controlling the focal spot quality with a deformable mirror, we are able to show that increasing the fraction of pulse energy contained within the central part of the focal spot, while keeping the total energy and central spot size constant, significantly increases the amount of energy transferred to the wakefield: Our measurements show that the laser loses significantly more laser energy and undergoes greater redshifting and that more charge is produced in the accelerated beam. Three dimensional particle in cell simulations performed with accurate representations of the measured focal spot intensity distribution confirm that energy in the wings of the focal spot is effectively wasted. Even though self-focusing occurs, energy in the wings of the focal spot distribution is not coupled into the wakefield, emphasising the vital importance of high quality focal spot profiles in experiments.

AB - By controlling the focal spot quality with a deformable mirror, we are able to show that increasing the fraction of pulse energy contained within the central part of the focal spot, while keeping the total energy and central spot size constant, significantly increases the amount of energy transferred to the wakefield: Our measurements show that the laser loses significantly more laser energy and undergoes greater redshifting and that more charge is produced in the accelerated beam. Three dimensional particle in cell simulations performed with accurate representations of the measured focal spot intensity distribution confirm that energy in the wings of the focal spot is effectively wasted. Even though self-focusing occurs, energy in the wings of the focal spot distribution is not coupled into the wakefield, emphasising the vital importance of high quality focal spot profiles in experiments.

UR - http://www.scopus.com/inward/record.url?scp=84879950639&partnerID=8YFLogxK

U2 - 10.1063/1.4810795

DO - 10.1063/1.4810795

M3 - Article

AN - SCOPUS:84879950639

VL - 20

JO - Physics of Plasmas

JF - Physics of Plasmas

SN - 1527-2419

IS - 6

M1 - 064501

ER -