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Effects of front surface plasma expansion on proton acceleration in ultraintense laser irradiation of foil targets

McKenna, P. and Carroll, D.C. and Lundh, O. and Nurnberg, F. and Markey, K. and Bandyopadhyay, S. and Batani, D. and Evans, R.G. (2008) Effects of front surface plasma expansion on proton acceleration in ultraintense laser irradiation of foil targets. Laser and Particle Beams, 26 (4). pp. 591-596. ISSN 0263-0346

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Abstract

The properties of beams of high energy protons accelerated during ultraintense, picosecond laser-irradiation of thin foil targets are investigated as a function of preplasma expansion at the target front surface. Significant enhancement in the maximum proton energy and laser-to-proton energy conversion efficiency is observed at optimum preplasma density gradients, due to self-focusing of the incident laser pulse. For very long preplasma expansion, the propagating laser pulse is observed to filament, resulting in highly uniform proton beams, but with reduced flux and maximum energy.

Item type: Article
ID code: 19352
Notes: Strathprints' policy is to record up to 8 authors per publication, plus any additional authors based at the University of Strathclyde. More authors may be listed on the official publication than appear in the Strathprints' record.
Keywords: laser-plasma interaction, laser-proton acceleration, plasma expansion, Plasma physics. Ionized gases, Atomic and Molecular Physics, and Optics, Electrical and Electronic Engineering, Condensed Matter Physics
Subjects: Science > Physics > Plasma physics. Ionized gases
Department: Faculty of Science > Physics
Related URLs:
    Depositing user: Strathprints Administrator
    Date Deposited: 02 Jun 2010 10:28
    Last modified: 28 Mar 2014 05:17
    URI: http://strathprints.strath.ac.uk/id/eprint/19352

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