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; R. Prasad; G. Scott; M. Tampo; M. Zepf; J. Schreiber; Z. Najmudin

doi:10.1088/1367-2630/18/1/013038

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. NakatsutsumiR. Prasad, G. Scott, M. Tampo, M. Zepf, J. Schreiber, Z. Najmudin

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Abstract

Spectrally-peaked proton beams of high charge (E_p ≈ 8 MeV, ΔE ≈ 4 MeV, N ≈ 50 nC ) have been observed from the interaction of an intense laser (>10¹⁹Wcm^-2) with ultrathinCHfoils, 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 chargeto-mass ratio, the protons outrun a carbon plasma driven in the relativistic transparency regime.

Original language	English
Article number	013038
Number of pages	8
Journal	New Journal of Physics
Volume	18
Issue number	1
DOIs	https://doi.org/10.1088/1367-2630/18/1/013038
Publication status	Published - 18 Jan 2016

Keywords

ion acceleration
laser ion source
laser-plasma interaction
proton acceleration

ASJC Scopus subject areas

General Physics and Astronomy

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10.1088/1367-2630/18/1/013038

Buffered high charge spectrally-peaked proton beams in the relativistic-transparency regime
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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., ... Najmudin, Z. (2016). Buffered high charge spectrally-peaked proton beams in the relativistic-transparency regime. New Journal of Physics, 18(1), Article 013038. https://doi.org/10.1088/1367-2630/18/1/013038

@article{8b90417048114557ae6b489e2e95b329,

title = "Buffered high charge spectrally-peaked proton beams in the relativistic-transparency regime",

abstract = "Spectrally-peaked proton beams of high charge (Ep ≈ 8 MeV, ΔE ≈ 4 MeV, N ≈ 50 nC ) have been observed from the interaction of an intense laser (>1019Wcm-2) with ultrathinCHfoils, 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 chargeto-mass ratio, the protons outrun a carbon plasma driven in the relativistic transparency regime.",

keywords = "ion acceleration, laser ion source, laser-plasma interaction, proton acceleration",

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

year = "2016",

month = jan,

day = "18",

doi = "10.1088/1367-2630/18/1/013038",

language = "English",

volume = "18",

journal = "New Journal of Physics",

issn = "1367-2630",

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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, no. 1, 013038. https://doi.org/10.1088/1367-2630/18/1/013038

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, ΔE ≈ 4 MeV, N ≈ 50 nC ) have been observed from the interaction of an intense laser (>1019Wcm-2) with ultrathinCHfoils, 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 chargeto-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, ΔE ≈ 4 MeV, N ≈ 50 nC ) have been observed from the interaction of an intense laser (>1019Wcm-2) with ultrathinCHfoils, 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 chargeto-mass ratio, the protons outrun a carbon plasma driven in the relativistic transparency regime.

KW - ion acceleration

KW - laser ion source

KW - laser-plasma interaction

KW - proton acceleration

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

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

M3 - Article

AN - SCOPUS:84957602696

SN - 1367-2630

VL - 18

JO - New Journal of Physics

JF - New Journal of Physics

IS - 1

M1 - 013038

ER -

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

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Charlotte Palmer

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

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ASJC Scopus subject areas

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Charlotte Palmer

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