Buffered high charge spectrally-peaked proton beams in the relativistic-transparency regime

N P Dover, C A J Palmer, M J V Streeter, H Ahmed, B Albertazzi, M Borghesi, D C Carroll, J Fuchs, R Heathcote, P Hilz, K F Kakolee, S Kar, R. Kodama, A Kon, D A MacLellan, P McKenna, S R Nagel, D Neely, M M Notley, M Nakatsutsumi & 6 others R Prasad, G Scott, M Tampo, M Zepf, J Schreiber, Z Najmudin

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

Spectrally-peaked proton beams of high charge (Ep » 8 MeV, DE » 4 MeV, N » 50 nC ) have been observed from the interaction of an intense laser (>1019 W cm−2) with ultrathin CH foils, as measured by spectrally-resolved full beam profiles. These beams are reproducibly generated for foil thicknesses 5–100 nm, and exhibit narrowing divergence with decreasing target thickness down to »8 for 5 nm. Simulations demonstrate that the narrow energy spread feature is a result of buffered acceleration of protons. The radiation pressure at the front of the target results in asymmetric sheath fields which permeate throughout the target, causing preferential forward acceleration. Due to their higher charge- to-mass ratio, the protons outrun a carbon plasma driven in the relativistic transparency regime.
LanguageEnglish
Article number013038
Number of pages8
JournalNew Journal of Physics
Volume18
DOIs
Publication statusPublished - 18 Jan 2016

Fingerprint

proton beams
foils
target thickness
protons
radiation pressure
sheaths
mass ratios
divergence
methylidyne
carbon
profiles
lasers
simulation
interactions
energy

Keywords

  • high intensity lasers
  • proton beams
  • micron thick foils

Cite this

Dover, N. P., Palmer, C. A. J., Streeter, M. J. V., Ahmed, H., Albertazzi, B., Borghesi, M., ... Najmudin, Z. (2016). Buffered high charge spectrally-peaked proton beams in the relativistic-transparency regime. New Journal of Physics, 18, [013038]. https://doi.org/10.1088/1367-2630/18/1/013038
Dover, N P ; Palmer, C A J ; Streeter, M J V ; Ahmed, H ; Albertazzi, B ; Borghesi, M ; Carroll, D C ; Fuchs, J ; Heathcote, R ; Hilz, P ; Kakolee, K F ; Kar, S ; Kodama, R. ; Kon, A ; MacLellan, D A ; McKenna, P ; Nagel, S R ; Neely, D ; Notley, M M ; Nakatsutsumi, M ; Prasad, R ; Scott, G ; Tampo, M ; Zepf, M ; Schreiber, J ; Najmudin, Z. / Buffered high charge spectrally-peaked proton beams in the relativistic-transparency regime. In: New Journal of Physics. 2016 ; Vol. 18.
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title = "Buffered high charge spectrally-peaked proton beams in the relativistic-transparency regime",
abstract = "Spectrally-peaked proton beams of high charge (Ep » 8 MeV, DE » 4 MeV, N » 50 nC ) have been observed from the interaction of an intense laser (>1019 W cm−2) with ultrathin CH foils, as measured by spectrally-resolved full beam profiles. These beams are reproducibly generated for foil thicknesses 5–100 nm, and exhibit narrowing divergence with decreasing target thickness down to »8 for 5 nm. Simulations demonstrate that the narrow energy spread feature is a result of buffered acceleration of protons. The radiation pressure at the front of the target results in asymmetric sheath fields which permeate throughout the target, causing preferential forward acceleration. Due to their higher charge- to-mass ratio, the protons outrun a carbon plasma driven in the relativistic transparency regime.",
keywords = "high intensity lasers, proton beams, micron thick foils",
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Dover, NP, Palmer, CAJ, Streeter, MJV, Ahmed, H, Albertazzi, B, Borghesi, M, Carroll, DC, Fuchs, J, Heathcote, R, Hilz, P, Kakolee, KF, Kar, S, Kodama, R, Kon, A, MacLellan, DA, McKenna, P, Nagel, SR, Neely, D, Notley, MM, Nakatsutsumi, M, Prasad, R, Scott, G, Tampo, M, Zepf, M, Schreiber, J & Najmudin, Z 2016, 'Buffered high charge spectrally-peaked proton beams in the relativistic-transparency regime' New Journal of Physics, vol. 18, 013038. https://doi.org/10.1088/1367-2630/18/1/013038

Buffered high charge spectrally-peaked proton beams in the relativistic-transparency regime. / Dover, N P; Palmer, C A J; Streeter, M J V; Ahmed, H; Albertazzi, B; Borghesi, M; Carroll, D C; Fuchs, J; Heathcote, R; Hilz, P; Kakolee, K F; Kar, S; Kodama, R.; Kon, A; MacLellan, D A; McKenna, P; Nagel, S R; Neely, D; Notley, M M; Nakatsutsumi, M; Prasad, R; Scott, G; Tampo, M; Zepf, M; Schreiber, J; Najmudin, Z.

In: New Journal of Physics, Vol. 18, 013038, 18.01.2016.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Buffered high charge spectrally-peaked proton beams in the relativistic-transparency regime

AU - Dover, N P

AU - Palmer, C A J

AU - Streeter, M J V

AU - Ahmed, H

AU - Albertazzi, B

AU - Borghesi, M

AU - Carroll, D C

AU - Fuchs, J

AU - Heathcote, R

AU - Hilz, P

AU - Kakolee, K F

AU - Kar, S

AU - Kodama, R.

AU - Kon, A

AU - MacLellan, D A

AU - McKenna, P

AU - Nagel, S R

AU - Neely, D

AU - Notley, M M

AU - Nakatsutsumi, M

AU - Prasad, R

AU - Scott, G

AU - Tampo, M

AU - Zepf, M

AU - Schreiber, J

AU - Najmudin, Z

PY - 2016/1/18

Y1 - 2016/1/18

N2 - Spectrally-peaked proton beams of high charge (Ep » 8 MeV, DE » 4 MeV, N » 50 nC ) have been observed from the interaction of an intense laser (>1019 W cm−2) with ultrathin CH foils, as measured by spectrally-resolved full beam profiles. These beams are reproducibly generated for foil thicknesses 5–100 nm, and exhibit narrowing divergence with decreasing target thickness down to »8 for 5 nm. Simulations demonstrate that the narrow energy spread feature is a result of buffered acceleration of protons. The radiation pressure at the front of the target results in asymmetric sheath fields which permeate throughout the target, causing preferential forward acceleration. Due to their higher charge- to-mass ratio, the protons outrun a carbon plasma driven in the relativistic transparency regime.

AB - Spectrally-peaked proton beams of high charge (Ep » 8 MeV, DE » 4 MeV, N » 50 nC ) have been observed from the interaction of an intense laser (>1019 W cm−2) with ultrathin CH foils, as measured by spectrally-resolved full beam profiles. These beams are reproducibly generated for foil thicknesses 5–100 nm, and exhibit narrowing divergence with decreasing target thickness down to »8 for 5 nm. Simulations demonstrate that the narrow energy spread feature is a result of buffered acceleration of protons. The radiation pressure at the front of the target results in asymmetric sheath fields which permeate throughout the target, causing preferential forward acceleration. Due to their higher charge- to-mass ratio, the protons outrun a carbon plasma driven in the relativistic transparency regime.

KW - high intensity lasers

KW - proton beams

KW - micron thick foils

UR - http://iopscience.iop.org/article/10.1088/1367-2630/18/1/013038?fromSearchPage=true

U2 - 10.1088/1367-2630/18/1/013038

DO - 10.1088/1367-2630/18/1/013038

M3 - Article

VL - 18

JO - New Journal of Physics

T2 - New Journal of Physics

JF - New Journal of Physics

SN - 1367-2630

M1 - 013038

ER -