Spectral modification of laser-accelerated proton beams by self-generated magnetic fields

A.P.L. Robinson, P. Foster, D. Adams, D.C. Carroll, B. Dromey, S. Hawkes, S. Kar, Y.T. Li, K. Markey, Paul Mckenna, C. Spindloe, M. Streeter, C-G Wahlström, M. H. Xu, M. Zepf, D. Neely

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

Target normal measurements of proton energy spectra from ultrathin (50-200 nm) planar foil targets irradiated by 10(19) W cm(-2) 40 fs laser pulses exhibit broad maxima that are not present in the energy spectra from micron thickness targets (6 mu m). The proton flux in the peak is considerably greater than the proton flux observed in the same energy range in thicker targets. Numerical modelling of the experiment indicates that this spectral modification in thin targets is caused by magnetic fields that grow at the rear of the target during the laser-target interaction.
LanguageEnglish
Article number83018
Number of pages15
JournalNew Journal of Physics
Volume11
DOIs
Publication statusPublished - 13 Aug 2009

Fingerprint

proton beams
magnetic fields
lasers
energy spectra
laser target interactions
target thickness
protons
proton energy
foils
pulses
energy

Keywords

  • plasma interactions
  • solid interactions
  • relativistic ions
  • driven
  • transport
  • foils

Cite this

Robinson, A. P. L., Foster, P., Adams, D., Carroll, D. C., Dromey, B., Hawkes, S., ... Neely, D. (2009). Spectral modification of laser-accelerated proton beams by self-generated magnetic fields. New Journal of Physics, 11, [83018]. https://doi.org/10.1088/1367-2630/11/8/083018
Robinson, A.P.L. ; Foster, P. ; Adams, D. ; Carroll, D.C. ; Dromey, B. ; Hawkes, S. ; Kar, S. ; Li, Y.T. ; Markey, K. ; Mckenna, Paul ; Spindloe, C. ; Streeter, M. ; Wahlström, C-G ; Xu, M. H. ; Zepf, M. ; Neely, D. / Spectral modification of laser-accelerated proton beams by self-generated magnetic fields. In: New Journal of Physics. 2009 ; Vol. 11.
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abstract = "Target normal measurements of proton energy spectra from ultrathin (50-200 nm) planar foil targets irradiated by 10(19) W cm(-2) 40 fs laser pulses exhibit broad maxima that are not present in the energy spectra from micron thickness targets (6 mu m). The proton flux in the peak is considerably greater than the proton flux observed in the same energy range in thicker targets. Numerical modelling of the experiment indicates that this spectral modification in thin targets is caused by magnetic fields that grow at the rear of the target during the laser-target interaction.",
keywords = "plasma interactions, solid interactions, relativistic ions, driven, transport, foils",
author = "A.P.L. Robinson and P. Foster and D. Adams and D.C. Carroll and B. Dromey and S. Hawkes and S. Kar and Y.T. Li and K. Markey and Paul Mckenna and C. Spindloe and M. Streeter and C-G Wahlstr{\"o}m and Xu, {M. H.} and M. Zepf and D. Neely",
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Robinson, APL, Foster, P, Adams, D, Carroll, DC, Dromey, B, Hawkes, S, Kar, S, Li, YT, Markey, K, Mckenna, P, Spindloe, C, Streeter, M, Wahlström, C-G, Xu, MH, Zepf, M & Neely, D 2009, 'Spectral modification of laser-accelerated proton beams by self-generated magnetic fields' New Journal of Physics, vol. 11, 83018. https://doi.org/10.1088/1367-2630/11/8/083018

Spectral modification of laser-accelerated proton beams by self-generated magnetic fields. / Robinson, A.P.L.; Foster, P.; Adams, D.; Carroll, D.C.; Dromey, B.; Hawkes, S.; Kar, S.; Li, Y.T.; Markey, K.; Mckenna, Paul; Spindloe, C.; Streeter, M.; Wahlström, C-G; Xu, M. H.; Zepf, M.; Neely, D.

In: New Journal of Physics, Vol. 11, 83018, 13.08.2009.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Spectral modification of laser-accelerated proton beams by self-generated magnetic fields

AU - Robinson, A.P.L.

AU - Foster, P.

AU - Adams, D.

AU - Carroll, D.C.

AU - Dromey, B.

AU - Hawkes, S.

AU - Kar, S.

AU - Li, Y.T.

AU - Markey, K.

AU - Mckenna, Paul

AU - Spindloe, C.

AU - Streeter, M.

AU - Wahlström, C-G

AU - Xu, M. H.

AU - Zepf, M.

AU - Neely, D.

PY - 2009/8/13

Y1 - 2009/8/13

N2 - Target normal measurements of proton energy spectra from ultrathin (50-200 nm) planar foil targets irradiated by 10(19) W cm(-2) 40 fs laser pulses exhibit broad maxima that are not present in the energy spectra from micron thickness targets (6 mu m). The proton flux in the peak is considerably greater than the proton flux observed in the same energy range in thicker targets. Numerical modelling of the experiment indicates that this spectral modification in thin targets is caused by magnetic fields that grow at the rear of the target during the laser-target interaction.

AB - Target normal measurements of proton energy spectra from ultrathin (50-200 nm) planar foil targets irradiated by 10(19) W cm(-2) 40 fs laser pulses exhibit broad maxima that are not present in the energy spectra from micron thickness targets (6 mu m). The proton flux in the peak is considerably greater than the proton flux observed in the same energy range in thicker targets. Numerical modelling of the experiment indicates that this spectral modification in thin targets is caused by magnetic fields that grow at the rear of the target during the laser-target interaction.

KW - plasma interactions

KW - solid interactions

KW - relativistic ions

KW - driven

KW - transport

KW - foils

U2 - 10.1088/1367-2630/11/8/083018

DO - 10.1088/1367-2630/11/8/083018

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JO - New Journal of Physics

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JF - New Journal of Physics

SN - 1367-2630

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ER -