Hollow microspheres as targets for staged laser-driven proton acceleration

M Burza, A Gonoskov, G Genoud, A Persson, K Svensson, M Quinn, P McKenna, M Marklund, C-G Wahlström

Research output: Contribution to journalArticle

14 Citations (Scopus)

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.

LanguageEnglish
Article number013030
Number of pages14
JournalNew Journal of Physics
Volume13
DOIs
Publication statusPublished - 21 Jan 2011

Fingerprint

hollow
protons
sheaths
lasers
polarization (charge separation)
geometry
recycling
proton energy
hot electrons
energy spectra
cells
electrons
simulation
interactions

Keywords

  • thin foils
  • intensity
  • generation
  • contrast
  • pulses
  • beams
  • ions

Cite this

Burza, M., Gonoskov, A., Genoud, G., Persson, A., Svensson, K., Quinn, M., ... Wahlström, C-G. (2011). Hollow microspheres as targets for staged laser-driven proton acceleration. New Journal of Physics, 13, [013030]. https://doi.org/10.1088/1367-2630/13/1/013030
Burza, M ; Gonoskov, A ; Genoud, G ; Persson, A ; Svensson, K ; Quinn, M ; McKenna, P ; Marklund, M ; Wahlström, C-G. / Hollow microspheres as targets for staged laser-driven proton acceleration. In: New Journal of Physics. 2011 ; Vol. 13.
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Burza, M, Gonoskov, A, Genoud, G, Persson, A, Svensson, K, Quinn, M, McKenna, P, Marklund, M & Wahlström, C-G 2011, 'Hollow microspheres as targets for staged laser-driven proton acceleration' New Journal of Physics, vol. 13, 013030. https://doi.org/10.1088/1367-2630/13/1/013030

Hollow microspheres as targets for staged laser-driven proton acceleration. / Burza, M; Gonoskov, A; Genoud, G; Persson, A; Svensson, K; Quinn, M; McKenna, P; Marklund, M; Wahlström, C-G.

In: New Journal of Physics, Vol. 13, 013030, 21.01.2011.

Research output: Contribution to journalArticle

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AU - Marklund, M

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Burza M, Gonoskov A, Genoud G, Persson A, Svensson K, Quinn M et al. Hollow microspheres as targets for staged laser-driven proton acceleration. New Journal of Physics. 2011 Jan 21;13. 013030. https://doi.org/10.1088/1367-2630/13/1/013030