Ion acceleration and plasma jet formation in ultra-thin foils undergoing expansion and relativistic transparency

M. King, R.J. Gray, H.W. Powell, D.A. Maclellan, Bruno Izquierdo, L.C. Stockhausen, G.S. Hicks, N.P. Dover, D.R. Rusby, D.C. Carroll, H. Padda, R. Torres, S. Kar, R.J. Clarke, I.O. Musgrave, Z. Najmudin, M. Borghesi, D. Neely, P. Mckenna

Research output: Contribution to journalSpecial issue

6 Citations (Scopus)

Abstract

At sufficiently high laser intensities, the rapid heating to relativistic velocities and resulting decompression of plasma electrons in an ultra-thin target foil can result in the target becoming relativistically transparent to the laser light during the interaction. Ion acceleration in this regime is strongly affected by the transition from an opaque to a relativistically transparent plasma. By spatially resolving the laser-accelerated proton beam at near-normal laser incidence and at an incidence angle of 30°, we identify characteristic features both experimentally and in particle-in-cell simulations which are consistent with the onset of three distinct ion acceleration mechanisms: sheath acceleration; radiation pressure acceleration; and transparency-enhanced acceleration. The latter mechanism occurs late in the interaction and is mediated by the formation of a plasma jet extending into the expanding ion population. The effect of laser incident angle on the plasma jet is explored.
LanguageEnglish
Pages163-166
Number of pages4
JournalNuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volume829
Early online date19 Feb 2016
DOIs
Publication statusPublished - 1 Sep 2016

Fingerprint

Plasma jets
Transparency
plasma jets
Metal foil
foils
expansion
Lasers
Ions
ions
lasers
incidence
relativistic velocity
Plasmas
Proton beams
pressure reduction
radiation pressure
electron plasma
proton beams
sheaths
high power lasers

Keywords

  • laser-driven ion acceleration
  • plasma jet
  • intense laser-plasma interaction
  • relativistic induced transparency

Cite this

King, M. ; Gray, R.J. ; Powell, H.W. ; Maclellan, D.A. ; Izquierdo, Bruno ; Stockhausen, L.C. ; Hicks, G.S. ; Dover, N.P. ; Rusby, D.R. ; Carroll, D.C. ; Padda, H. ; Torres, R. ; Kar, S. ; Clarke, R.J. ; Musgrave, I.O. ; Najmudin, Z. ; Borghesi, M. ; Neely, D. ; Mckenna, P. / Ion acceleration and plasma jet formation in ultra-thin foils undergoing expansion and relativistic transparency. In: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 2016 ; Vol. 829. pp. 163-166.
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title = "Ion acceleration and plasma jet formation in ultra-thin foils undergoing expansion and relativistic transparency",
abstract = "At sufficiently high laser intensities, the rapid heating to relativistic velocities and resulting decompression of plasma electrons in an ultra-thin target foil can result in the target becoming relativistically transparent to the laser light during the interaction. Ion acceleration in this regime is strongly affected by the transition from an opaque to a relativistically transparent plasma. By spatially resolving the laser-accelerated proton beam at near-normal laser incidence and at an incidence angle of 30°, we identify characteristic features both experimentally and in particle-in-cell simulations which are consistent with the onset of three distinct ion acceleration mechanisms: sheath acceleration; radiation pressure acceleration; and transparency-enhanced acceleration. The latter mechanism occurs late in the interaction and is mediated by the formation of a plasma jet extending into the expanding ion population. The effect of laser incident angle on the plasma jet is explored.",
keywords = "laser-driven ion acceleration, plasma jet, intense laser-plasma interaction, relativistic induced transparency",
author = "M. King and R.J. Gray and H.W. Powell and D.A. Maclellan and Bruno Izquierdo and L.C. Stockhausen and G.S. Hicks and N.P. Dover and D.R. Rusby and D.C. Carroll and H. Padda and R. Torres and S. Kar and R.J. Clarke and I.O. Musgrave and Z. Najmudin and M. Borghesi and D. Neely and P. Mckenna",
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King, M, Gray, RJ, Powell, HW, Maclellan, DA, Izquierdo, B, Stockhausen, LC, Hicks, GS, Dover, NP, Rusby, DR, Carroll, DC, Padda, H, Torres, R, Kar, S, Clarke, RJ, Musgrave, IO, Najmudin, Z, Borghesi, M, Neely, D & Mckenna, P 2016, 'Ion acceleration and plasma jet formation in ultra-thin foils undergoing expansion and relativistic transparency' Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, vol. 829, pp. 163-166. https://doi.org/10.1016/j.nima.2016.02.032

Ion acceleration and plasma jet formation in ultra-thin foils undergoing expansion and relativistic transparency. / King, M.; Gray, R.J.; Powell, H.W.; Maclellan, D.A.; Izquierdo, Bruno; Stockhausen, L.C.; Hicks, G.S.; Dover, N.P.; Rusby, D.R.; Carroll, D.C.; Padda, H.; Torres, R.; Kar, S.; Clarke, R.J.; Musgrave, I.O.; Najmudin, Z.; Borghesi, M.; Neely, D.; Mckenna, P.

In: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 829, 01.09.2016, p. 163-166.

Research output: Contribution to journalSpecial issue

TY - JOUR

T1 - Ion acceleration and plasma jet formation in ultra-thin foils undergoing expansion and relativistic transparency

AU - King, M.

AU - Gray, R.J.

AU - Powell, H.W.

AU - Maclellan, D.A.

AU - Izquierdo, Bruno

AU - Stockhausen, L.C.

AU - Hicks, G.S.

AU - Dover, N.P.

AU - Rusby, D.R.

AU - Carroll, D.C.

AU - Padda, H.

AU - Torres, R.

AU - Kar, S.

AU - Clarke, R.J.

AU - Musgrave, I.O.

AU - Najmudin, Z.

AU - Borghesi, M.

AU - Neely, D.

AU - Mckenna, P.

PY - 2016/9/1

Y1 - 2016/9/1

N2 - At sufficiently high laser intensities, the rapid heating to relativistic velocities and resulting decompression of plasma electrons in an ultra-thin target foil can result in the target becoming relativistically transparent to the laser light during the interaction. Ion acceleration in this regime is strongly affected by the transition from an opaque to a relativistically transparent plasma. By spatially resolving the laser-accelerated proton beam at near-normal laser incidence and at an incidence angle of 30°, we identify characteristic features both experimentally and in particle-in-cell simulations which are consistent with the onset of three distinct ion acceleration mechanisms: sheath acceleration; radiation pressure acceleration; and transparency-enhanced acceleration. The latter mechanism occurs late in the interaction and is mediated by the formation of a plasma jet extending into the expanding ion population. The effect of laser incident angle on the plasma jet is explored.

AB - At sufficiently high laser intensities, the rapid heating to relativistic velocities and resulting decompression of plasma electrons in an ultra-thin target foil can result in the target becoming relativistically transparent to the laser light during the interaction. Ion acceleration in this regime is strongly affected by the transition from an opaque to a relativistically transparent plasma. By spatially resolving the laser-accelerated proton beam at near-normal laser incidence and at an incidence angle of 30°, we identify characteristic features both experimentally and in particle-in-cell simulations which are consistent with the onset of three distinct ion acceleration mechanisms: sheath acceleration; radiation pressure acceleration; and transparency-enhanced acceleration. The latter mechanism occurs late in the interaction and is mediated by the formation of a plasma jet extending into the expanding ion population. The effect of laser incident angle on the plasma jet is explored.

KW - laser-driven ion acceleration

KW - plasma jet

KW - intense laser-plasma interaction

KW - relativistic induced transparency

UR - http://www.sciencedirect.com/science/journal/01689002

U2 - 10.1016/j.nima.2016.02.032

DO - 10.1016/j.nima.2016.02.032

M3 - Special issue

VL - 829

SP - 163

EP - 166

JO - Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

T2 - Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

JF - Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

SN - 0168-9002

ER -