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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)
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author
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organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physical Review Special Topics. Accelerators and Beams
volume
18
issue
7
article number
071303
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
2016-04-01 13:35:03
date last changed
2022-03-21 19:19:29
@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.}},
  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}},
  doi          = {{10.1103/PhysRevSTAB.18.071303}},
  volume       = {{18}},
  year         = {{2015}},
}