Spectral control in proton acceleration with multiple laser pulses

A.P.L. Robinson, D. Neely, P. McKenna, R.G. Evans

Research output: Contribution to journalArticle

39 Citations (Scopus)

Abstract

We address the question of whether multiple high intensity (> 10(18) W cm(-2)) laser pulses ( each O( 100 fs)) can produce proton beams with a modified energy spectrum on irradiating a foil target. This has been studied in one dimension with both Vlasov and particle-in-cell codes. A reduction in the maximum proton energy, and the generation of spectral peaks, is observed. This is the first theoretical demonstration of spectral peak generation by purely optical means. The mechanism, which has been termed multiple pulse sheath acceleration, that produces these spectral peaks is described, and the same mechanism occurs in both sets of simulations.

LanguageEnglish
Pages373-384
Number of pages12
JournalPlasma Physics and Controlled Fusion
Volume49
Issue number4
DOIs
Publication statusPublished - Apr 2007

Fingerprint

Proton beams
Metal foil
Laser pulses
Protons
Demonstrations
Cells
protons
pulses
lasers
proton energy
proton beams
sheaths
foils
energy spectra
simulation

Keywords

  • ion acceleration
  • solid interactions
  • fast ignition
  • thin foils
  • generation
  • beams
  • expansion
  • target
  • vacuum
  • plasmas

Cite this

Robinson, A.P.L. ; Neely, D. ; McKenna, P. ; Evans, R.G. / Spectral control in proton acceleration with multiple laser pulses. In: Plasma Physics and Controlled Fusion. 2007 ; Vol. 49, No. 4. pp. 373-384.
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Spectral control in proton acceleration with multiple laser pulses. / Robinson, A.P.L.; Neely, D.; McKenna, P.; Evans, R.G.

In: Plasma Physics and Controlled Fusion, Vol. 49, No. 4, 04.2007, p. 373-384.

Research output: Contribution to journalArticle

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AU - Robinson, A.P.L.

AU - Neely, D.

AU - McKenna, P.

AU - Evans, R.G.

PY - 2007/4

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N2 - We address the question of whether multiple high intensity (> 10(18) W cm(-2)) laser pulses ( each O( 100 fs)) can produce proton beams with a modified energy spectrum on irradiating a foil target. This has been studied in one dimension with both Vlasov and particle-in-cell codes. A reduction in the maximum proton energy, and the generation of spectral peaks, is observed. This is the first theoretical demonstration of spectral peak generation by purely optical means. The mechanism, which has been termed multiple pulse sheath acceleration, that produces these spectral peaks is described, and the same mechanism occurs in both sets of simulations.

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KW - ion acceleration

KW - solid interactions

KW - fast ignition

KW - thin foils

KW - generation

KW - beams

KW - expansion

KW - target

KW - vacuum

KW - plasmas

U2 - 10.1088/0741-3335/49/4/002

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