Ballistic focusing of polyenergetic protons driven by petawatt laser pulses

S. Kar, K. Markey, M. Borghesi, D. C. Carroll, P. McKenna, D. Neely, M. N. Quinn, M. Zepf

Research output: Contribution to journalArticle

28 Citations (Scopus)

Abstract

By using a thick (250 mu m) target with 350 mu m radius of curvature, the intense proton beam driven by a petawatt laser is focused at a distance of similar to 1 mm from the target for all detectable energies up to similar to 25 MeV. The thickness of the foil facilitates beam focusing as it suppresses the dynamic evolution of the beam divergence caused by peaked electron flux distribution at the target rear side. In addition, reduction in inherent beam divergence due to the target thickness relaxes the curvature requirement for short-range focusing. Energy resolved mapping of the proton beam trajectories from mesh radiographs infers the focusing and the data agree with a simple geometrical modeling based on ballistic beam propagation.

LanguageEnglish
Article number225003
Number of pages4
JournalPhysical Review Letters
Volume106
Issue number22
DOIs
Publication statusPublished - 2 Jun 2011

Fingerprint

ballistics
protons
pulses
proton beams
lasers
divergence
curvature
target thickness
electron flux
mesh
foils
trajectories
requirements
radii
propagation
energy

Keywords

  • acceleration
  • irradiation
  • generation
  • targets

Cite this

Kar, S., Markey, K., Borghesi, M., Carroll, D. C., McKenna, P., Neely, D., ... Zepf, M. (2011). Ballistic focusing of polyenergetic protons driven by petawatt laser pulses. Physical Review Letters, 106(22), [225003]. https://doi.org/10.1103/PhysRevLett.106.225003
Kar, S. ; Markey, K. ; Borghesi, M. ; Carroll, D. C. ; McKenna, P. ; Neely, D. ; Quinn, M. N. ; Zepf, M. / Ballistic focusing of polyenergetic protons driven by petawatt laser pulses. In: Physical Review Letters. 2011 ; Vol. 106, No. 22.
@article{1ee408855e30437191c8fb0b44959bbe,
title = "Ballistic focusing of polyenergetic protons driven by petawatt laser pulses",
abstract = "By using a thick (250 mu m) target with 350 mu m radius of curvature, the intense proton beam driven by a petawatt laser is focused at a distance of similar to 1 mm from the target for all detectable energies up to similar to 25 MeV. The thickness of the foil facilitates beam focusing as it suppresses the dynamic evolution of the beam divergence caused by peaked electron flux distribution at the target rear side. In addition, reduction in inherent beam divergence due to the target thickness relaxes the curvature requirement for short-range focusing. Energy resolved mapping of the proton beam trajectories from mesh radiographs infers the focusing and the data agree with a simple geometrical modeling based on ballistic beam propagation.",
keywords = "acceleration, irradiation, generation, targets",
author = "S. Kar and K. Markey and M. Borghesi and Carroll, {D. C.} and P. McKenna and D. Neely and Quinn, {M. N.} and M. Zepf",
year = "2011",
month = "6",
day = "2",
doi = "10.1103/PhysRevLett.106.225003",
language = "English",
volume = "106",
journal = "Physical Review Letters",
issn = "0031-9007",
number = "22",

}

Kar, S, Markey, K, Borghesi, M, Carroll, DC, McKenna, P, Neely, D, Quinn, MN & Zepf, M 2011, 'Ballistic focusing of polyenergetic protons driven by petawatt laser pulses' Physical Review Letters, vol. 106, no. 22, 225003. https://doi.org/10.1103/PhysRevLett.106.225003

Ballistic focusing of polyenergetic protons driven by petawatt laser pulses. / Kar, S.; Markey, K.; Borghesi, M.; Carroll, D. C.; McKenna, P.; Neely, D.; Quinn, M. N.; Zepf, M.

In: Physical Review Letters, Vol. 106, No. 22, 225003, 02.06.2011.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Ballistic focusing of polyenergetic protons driven by petawatt laser pulses

AU - Kar, S.

AU - Markey, K.

AU - Borghesi, M.

AU - Carroll, D. C.

AU - McKenna, P.

AU - Neely, D.

AU - Quinn, M. N.

AU - Zepf, M.

PY - 2011/6/2

Y1 - 2011/6/2

N2 - By using a thick (250 mu m) target with 350 mu m radius of curvature, the intense proton beam driven by a petawatt laser is focused at a distance of similar to 1 mm from the target for all detectable energies up to similar to 25 MeV. The thickness of the foil facilitates beam focusing as it suppresses the dynamic evolution of the beam divergence caused by peaked electron flux distribution at the target rear side. In addition, reduction in inherent beam divergence due to the target thickness relaxes the curvature requirement for short-range focusing. Energy resolved mapping of the proton beam trajectories from mesh radiographs infers the focusing and the data agree with a simple geometrical modeling based on ballistic beam propagation.

AB - By using a thick (250 mu m) target with 350 mu m radius of curvature, the intense proton beam driven by a petawatt laser is focused at a distance of similar to 1 mm from the target for all detectable energies up to similar to 25 MeV. The thickness of the foil facilitates beam focusing as it suppresses the dynamic evolution of the beam divergence caused by peaked electron flux distribution at the target rear side. In addition, reduction in inherent beam divergence due to the target thickness relaxes the curvature requirement for short-range focusing. Energy resolved mapping of the proton beam trajectories from mesh radiographs infers the focusing and the data agree with a simple geometrical modeling based on ballistic beam propagation.

KW - acceleration

KW - irradiation

KW - generation

KW - targets

UR - http://www.scopus.com/inward/record.url?scp=79960643834&partnerID=8YFLogxK

U2 - 10.1103/PhysRevLett.106.225003

DO - 10.1103/PhysRevLett.106.225003

M3 - Article

VL - 106

JO - Physical Review Letters

T2 - Physical Review Letters

JF - Physical Review Letters

SN - 0031-9007

IS - 22

M1 - 225003

ER -