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 journalArticleScientificpeer-review

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.

Original languageEnglish
Article number013030
JournalNew Journal of Physics
Volume13
DOIs
Publication statusPublished - 1 Jan 2011
MoE publication typeNot Eligible

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

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, CG 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, 01.01.2011.

Research output: Contribution to journalArticleScientificpeer-review

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