Manipulation of the spatial distribution of laser-accelerated proton beams by varying the laser intensity distribution

B. Aurand, L. Senje, K. Svensson, M. Hansson, A. Higginson, A. Gonoskov, M. Marklund, A. Persson, O. Lundh, D. Neely, P. McKenna, C.-G. Wahlström

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

We report on a study of the spatial profile of proton beams produced through target normal sheath acceleration (TNSA) using at target foils and changing the laser intensity distribution on the target front surface. This is done by either defocusing a single laser pulse or by using a split-pulse setup and irradiating the target with two identical laser pulses with variable spatial separation. The resulting proton beam profile as well as the energy spectrum are recorded as functions of the focal spot size of the single laser pulse and of the separation between the two pulses. A shaping of the resulting proton beam profile, related to both an increase in ux of low-energy protons in the target normal direction and a decrease in their divergence, in one or two dimensions, is observed. The results are explained by simple modelling of rear surface sheath field expansion, ionization and projection of the resulting proton beam.
LanguageEnglish
Article number023113
Number of pages8
JournalPhysics of Plasmas
Volume23
Issue number2
DOIs
Publication statusPublished - 18 Feb 2016

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proton beams
manipulators
spatial distribution
pulses
lasers
sheaths
profiles
defocusing
proton energy
foils
divergence
energy spectra
projection
ionization
expansion

Keywords

  • laser plasma interaction
  • laser driven acceleration
  • acceleration by laser plasma interaction

Cite this

Aurand, B., Senje, L., Svensson, K., Hansson, M., Higginson, A., Gonoskov, A., ... Wahlström, C-G. (2016). Manipulation of the spatial distribution of laser-accelerated proton beams by varying the laser intensity distribution. Physics of Plasmas, 23(2), [023113]. https://doi.org/10.1063/1.4942032
Aurand, B. ; Senje, L. ; Svensson, K. ; Hansson, M. ; Higginson, A. ; Gonoskov, A. ; Marklund, M. ; Persson, A. ; Lundh, O. ; Neely, D. ; McKenna, P. ; Wahlström, C.-G. / Manipulation of the spatial distribution of laser-accelerated proton beams by varying the laser intensity distribution. In: Physics of Plasmas. 2016 ; Vol. 23, No. 2.
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abstract = "We report on a study of the spatial profile of proton beams produced through target normal sheath acceleration (TNSA) using at target foils and changing the laser intensity distribution on the target front surface. This is done by either defocusing a single laser pulse or by using a split-pulse setup and irradiating the target with two identical laser pulses with variable spatial separation. The resulting proton beam profile as well as the energy spectrum are recorded as functions of the focal spot size of the single laser pulse and of the separation between the two pulses. A shaping of the resulting proton beam profile, related to both an increase in ux of low-energy protons in the target normal direction and a decrease in their divergence, in one or two dimensions, is observed. The results are explained by simple modelling of rear surface sheath field expansion, ionization and projection of the resulting proton beam.",
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Aurand, B, Senje, L, Svensson, K, Hansson, M, Higginson, A, Gonoskov, A, Marklund, M, Persson, A, Lundh, O, Neely, D, McKenna, P & Wahlström, C-G 2016, 'Manipulation of the spatial distribution of laser-accelerated proton beams by varying the laser intensity distribution' Physics of Plasmas, vol. 23, no. 2, 023113. https://doi.org/10.1063/1.4942032

Manipulation of the spatial distribution of laser-accelerated proton beams by varying the laser intensity distribution. / Aurand, B.; Senje, L.; Svensson, K.; Hansson, M.; Higginson, A.; Gonoskov, A.; Marklund, M.; Persson, A.; Lundh, O.; Neely, D.; McKenna, P.; Wahlström, C.-G.

In: Physics of Plasmas, Vol. 23, No. 2, 023113, 18.02.2016.

Research output: Contribution to journalArticle

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T1 - Manipulation of the spatial distribution of laser-accelerated proton beams by varying the laser intensity distribution

AU - Aurand, B.

AU - Senje, L.

AU - Svensson, K.

AU - Hansson, M.

AU - Higginson, A.

AU - Gonoskov, A.

AU - Marklund, M.

AU - Persson, A.

AU - Lundh, O.

AU - Neely, D.

AU - McKenna, P.

AU - Wahlström, C.-G.

PY - 2016/2/18

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N2 - We report on a study of the spatial profile of proton beams produced through target normal sheath acceleration (TNSA) using at target foils and changing the laser intensity distribution on the target front surface. This is done by either defocusing a single laser pulse or by using a split-pulse setup and irradiating the target with two identical laser pulses with variable spatial separation. The resulting proton beam profile as well as the energy spectrum are recorded as functions of the focal spot size of the single laser pulse and of the separation between the two pulses. A shaping of the resulting proton beam profile, related to both an increase in ux of low-energy protons in the target normal direction and a decrease in their divergence, in one or two dimensions, is observed. The results are explained by simple modelling of rear surface sheath field expansion, ionization and projection of the resulting proton beam.

AB - We report on a study of the spatial profile of proton beams produced through target normal sheath acceleration (TNSA) using at target foils and changing the laser intensity distribution on the target front surface. This is done by either defocusing a single laser pulse or by using a split-pulse setup and irradiating the target with two identical laser pulses with variable spatial separation. The resulting proton beam profile as well as the energy spectrum are recorded as functions of the focal spot size of the single laser pulse and of the separation between the two pulses. A shaping of the resulting proton beam profile, related to both an increase in ux of low-energy protons in the target normal direction and a decrease in their divergence, in one or two dimensions, is observed. The results are explained by simple modelling of rear surface sheath field expansion, ionization and projection of the resulting proton beam.

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KW - laser driven acceleration

KW - acceleration by laser plasma interaction

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