Advanced

Down-ramp injection and independently controlled acceleration of electrons in a tailored laser wakefield accelerator

Hansson, Martin LU ; Aurand, Bastian LU ; Davoine, X.; Ekerfelt, Henrik LU ; Svensson, Kristoffer LU ; Persson, Anders LU ; Wahlström, Claes-Göran LU and Lundh, O. (2015) In Physical Review Special Topics. Accelerators and Beams 18(7).
Abstract
We report on a study on controlled injection of electrons into the accelerating phase of a plasma wakefield accelerator by tailoring the target density distribution using two independent sources of gas. The tailored density distribution is achieved experimentally by inserting a narrow nozzle, with an orifice diameter of only 400 mu m, into a jet of gas supplied from a 2 mm diameter nozzle. The combination of these two nozzles is used to create two regions of different density connected by a density gradient. Using this setup we show independent control of the charge and energy distribution of the bunches of accelerated electron as well as decreased shot-to-shot fluctuations in these quantities compared to self-injection in a single gas... (More)
We report on a study on controlled injection of electrons into the accelerating phase of a plasma wakefield accelerator by tailoring the target density distribution using two independent sources of gas. The tailored density distribution is achieved experimentally by inserting a narrow nozzle, with an orifice diameter of only 400 mu m, into a jet of gas supplied from a 2 mm diameter nozzle. The combination of these two nozzles is used to create two regions of different density connected by a density gradient. Using this setup we show independent control of the charge and energy distribution of the bunches of accelerated electron as well as decreased shot-to-shot fluctuations in these quantities compared to self-injection in a single gas jet. Although the energy spectra are broad after injection, simulations show that further acceleration acts to compress the energy distribution and to yield peaked energy spectra. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physical Review Special Topics. Accelerators and Beams
volume
18
issue
7
publisher
American Physical Society
external identifiers
  • wos:000357647200001
  • scopus:84940399161
ISSN
1098-4402
DOI
10.1103/PhysRevSTAB.18.071303
language
English
LU publication?
yes
id
83af0634-9d89-4afa-9c63-1ff3d49f55b4 (old id 7790745)
date added to LUP
2015-09-03 15:22:44
date last changed
2017-10-22 04:08:32
@article{83af0634-9d89-4afa-9c63-1ff3d49f55b4,
  abstract     = {We report on a study on controlled injection of electrons into the accelerating phase of a plasma wakefield accelerator by tailoring the target density distribution using two independent sources of gas. The tailored density distribution is achieved experimentally by inserting a narrow nozzle, with an orifice diameter of only 400 mu m, into a jet of gas supplied from a 2 mm diameter nozzle. The combination of these two nozzles is used to create two regions of different density connected by a density gradient. Using this setup we show independent control of the charge and energy distribution of the bunches of accelerated electron as well as decreased shot-to-shot fluctuations in these quantities compared to self-injection in a single gas jet. Although the energy spectra are broad after injection, simulations show that further acceleration acts to compress the energy distribution and to yield peaked energy spectra.},
  articleno    = {071303},
  author       = {Hansson, Martin and Aurand, Bastian and Davoine, X. and Ekerfelt, Henrik and Svensson, Kristoffer and Persson, Anders and Wahlström, Claes-Göran and Lundh, O.},
  issn         = {1098-4402},
  language     = {eng},
  number       = {7},
  publisher    = {American Physical Society},
  series       = {Physical Review Special Topics. Accelerators and Beams},
  title        = {Down-ramp injection and independently controlled acceleration of electrons in a tailored laser wakefield accelerator},
  url          = {http://dx.doi.org/10.1103/PhysRevSTAB.18.071303},
  volume       = {18},
  year         = {2015},
}