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Hollow microspheres as targets for staged laser-driven proton acceleration

Burza, Matthias LU ; Gonoskov, A. ; Genoud, Guillaume LU ; Persson, Anders LU ; Svensson, Kristoffer LU ; Quinn, M. ; McKenna, P. ; Marklund, M. and Wahlström, Claes-Göran LU (2011) In New Journal of Physics 13.
Abstract
A coated hollow core microsphere is introduced as a novel target in ultra-intense laser-matter interaction experiments. In particular, it facilitates staged laser-driven proton acceleration by combining conventional target normal sheath acceleration (TNSA), power recycling of hot laterally spreading electrons and staging in a very simple and cheap target geometry. During TNSA of protons from one area of the sphere surface, laterally spreading hot electrons form a charge wave. Due to the spherical geometry, this wave refocuses on the opposite side of the sphere, where an opening has been laser micromachined. This leads to a strong transient charge separation field being set up there, which can post-accelerate those TNSA protons passing... (More)
A coated hollow core microsphere is introduced as a novel target in ultra-intense laser-matter interaction experiments. In particular, it facilitates staged laser-driven proton acceleration by combining conventional target normal sheath acceleration (TNSA), power recycling of hot laterally spreading electrons and staging in a very simple and cheap target geometry. During TNSA of protons from one area of the sphere surface, laterally spreading hot electrons form a charge wave. Due to the spherical geometry, this wave refocuses on the opposite side of the sphere, where an opening has been laser micromachined. This leads to a strong transient charge separation field being set up there, which can post-accelerate those TNSA protons passing through the hole at the right time. Experimentally, the feasibility of using such targets is demonstrated. A redistribution is encountered in the experimental proton energy spectra, as predicted by particle-in-cell simulations and attributed to transient fields set up by oscillating currents on the sphere surface. (Less)
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author
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organization
publishing date
type
Contribution to journal
publication status
published
subject
in
New Journal of Physics
volume
13
article number
013030
publisher
IOP Publishing
external identifiers
  • wos:000288903600030
  • scopus:79251586546
ISSN
1367-2630
DOI
10.1088/1367-2630/13/1/013030
language
English
LU publication?
yes
id
0d8763a7-c841-4239-9a29-bfeade4935ab (old id 1925773)
date added to LUP
2016-04-01 15:04:22
date last changed
2022-04-22 06:42:13
@article{0d8763a7-c841-4239-9a29-bfeade4935ab,
  abstract     = {{A coated hollow core microsphere is introduced as a novel target in ultra-intense laser-matter interaction experiments. In particular, it facilitates staged laser-driven proton acceleration by combining conventional target normal sheath acceleration (TNSA), power recycling of hot laterally spreading electrons and staging in a very simple and cheap target geometry. During TNSA of protons from one area of the sphere surface, laterally spreading hot electrons form a charge wave. Due to the spherical geometry, this wave refocuses on the opposite side of the sphere, where an opening has been laser micromachined. This leads to a strong transient charge separation field being set up there, which can post-accelerate those TNSA protons passing through the hole at the right time. Experimentally, the feasibility of using such targets is demonstrated. A redistribution is encountered in the experimental proton energy spectra, as predicted by particle-in-cell simulations and attributed to transient fields set up by oscillating currents on the sphere surface.}},
  author       = {{Burza, Matthias and Gonoskov, A. and Genoud, Guillaume and Persson, Anders and Svensson, Kristoffer and Quinn, M. and McKenna, P. and Marklund, M. and Wahlström, Claes-Göran}},
  issn         = {{1367-2630}},
  language     = {{eng}},
  publisher    = {{IOP Publishing}},
  series       = {{New Journal of Physics}},
  title        = {{Hollow microspheres as targets for staged laser-driven proton acceleration}},
  url          = {{http://dx.doi.org/10.1088/1367-2630/13/1/013030}},
  doi          = {{10.1088/1367-2630/13/1/013030}},
  volume       = {{13}},
  year         = {{2011}},
}