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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
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
New Journal of Physics
volume
13
publisher
IOP Publishing Ltd.
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
2011-05-11 08:28:48
date last changed
2017-10-08 04:08:40
@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.},
  articleno    = {013030},
  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 Ltd.},
  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},
  volume       = {13},
  year         = {2011},
}