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Laser-driven ultrafast field propagation on solid surfaces

Quinn, K. and Wilson, P.A. and Cecchetti, C.A. and Ramakrishna, B. and Romagnani, L. and Sarri, G. and Lancia, L. and Fuchs, J. and Gallegos, P. and Carroll, D.C. and Quinn, M.N. and Yuan, X.H. and McKenna, P. (2009) Laser-driven ultrafast field propagation on solid surfaces. Physical Review Letters, 102 (19). 194801-1-194801-4. ISSN 0031-9007

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Abstract

The interaction of a 3×1019 W/cm2 laser pulse with a metallic wire has been investigated using proton radiography. The pulse is observed to drive the propagation of a highly transient field along the wire at the speed of light. Within a temporal window of 20 ps, the current driven by this field rises to its peak magnitude ∼104 A before decaying to below measurable levels. Supported by particle-in-cell simulation results and simple theoretical reasoning, the transient field measured is interpreted as a charge-neutralizing disturbance propagated away from the interaction region as a result of the permanent loss of a small fraction of the laser-accelerated hot electron population to vacuum.

Item type: Article
ID code: 19120
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: electrons, targets, plasmas, Physics, Physics and Astronomy(all)
Subjects: Science > Physics
Department: Faculty of Science > Physics
Related URLs:
    Depositing user: Strathprints Administrator
    Date Deposited: 19 May 2010 14:10
    Last modified: 28 Mar 2014 05:20
    URI: http://strathprints.strath.ac.uk/id/eprint/19120

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