High-intensity laser-driven proton acceleration: influence of pulse contrast

P McKenna, F. Lindau, O. Lundh, D. Neely, A. Persson, C.G. Wahlstrom

Research output: Contribution to journalArticle

44 Citations (Scopus)

Abstract

Proton acceleration from the interaction of ultra-short laser pulses with thin foil targets at intensities greater than 10(18) W cm(-2) is discussed. An overview of the physical processes giving rise to the generation of protons with multi-MeV energies, in well defined beams with excellent spatial quality, is presented. Specifically, the discussion centres on the influence of laser pulse contrast on the spatial and energy distributions of accelerated proton beams. Results from an ongoing experimental investigation of proton acceleration using the 10 Hz multi-terawatt Ti : sapphire laser (35 fs, 35 TW) at the Lund Laser Centre are discussed. It is demonstrated that a window of amplified spontaneous emission (ASE) conditions exist, for which the direction of proton emission is sensitive to the ASE-pedestal preceding the peak of the laser pulse, and that by significantly improving the temporal contrast, using plasma mirrors, efficient proton acceleration is observed from target foils with thickness less than 50 nm.

LanguageEnglish
Pages711-723
Number of pages13
JournalPhilosophical Transactions A: Mathematical, Physical and Engineering Sciences
Volume364
Issue number1840
DOIs
Publication statusPublished - 15 Mar 2006

Fingerprint

high power lasers
Laser pulses
Protons
Laser
protons
Lasers
pulses
Spontaneous emission
lasers
Metal foil
spontaneous emission
foils
Ultrashort Laser Pulses
Target
Sapphire
Energy Distribution
Physical process
Experimental Investigation
Spatial Distribution
Proton beams

Keywords

  • laser-particle acceleration
  • proton beam
  • laser-plasma interactions
  • solid interactions
  • plasma interactions
  • hot electrons
  • heavy ion
  • generation

Cite this

McKenna, P ; Lindau, F. ; Lundh, O. ; Neely, D. ; Persson, A. ; Wahlstrom, C.G. . / High-intensity laser-driven proton acceleration : influence of pulse contrast. In: Philosophical Transactions A: Mathematical, Physical and Engineering Sciences. 2006 ; Vol. 364, No. 1840. pp. 711-723.
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High-intensity laser-driven proton acceleration : influence of pulse contrast. / McKenna, P ; Lindau, F.; Lundh, O.; Neely, D.; Persson, A. ; Wahlstrom, C.G. .

In: Philosophical Transactions A: Mathematical, Physical and Engineering Sciences, Vol. 364, No. 1840, 15.03.2006, p. 711-723.

Research output: Contribution to journalArticle

TY - JOUR

T1 - High-intensity laser-driven proton acceleration

T2 - Proceedings A: Mathematical, Physical and Engineering Sciences

AU - McKenna, P

AU - Lindau, F.

AU - Lundh, O.

AU - Neely, D.

AU - Persson, A.

AU - Wahlstrom, C.G.

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Y1 - 2006/3/15

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AB - Proton acceleration from the interaction of ultra-short laser pulses with thin foil targets at intensities greater than 10(18) W cm(-2) is discussed. An overview of the physical processes giving rise to the generation of protons with multi-MeV energies, in well defined beams with excellent spatial quality, is presented. Specifically, the discussion centres on the influence of laser pulse contrast on the spatial and energy distributions of accelerated proton beams. Results from an ongoing experimental investigation of proton acceleration using the 10 Hz multi-terawatt Ti : sapphire laser (35 fs, 35 TW) at the Lund Laser Centre are discussed. It is demonstrated that a window of amplified spontaneous emission (ASE) conditions exist, for which the direction of proton emission is sensitive to the ASE-pedestal preceding the peak of the laser pulse, and that by significantly improving the temporal contrast, using plasma mirrors, efficient proton acceleration is observed from target foils with thickness less than 50 nm.

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KW - proton beam

KW - laser-plasma interactions

KW - solid interactions

KW - plasma interactions

KW - hot electrons

KW - heavy ion

KW - generation

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