Observation of the transient charging of a laser-irradiated solid

Quinn, K. and Wilson, P.A. and Ramakrishna, B. and Sarri, G. and Romagnani, L. and Pipahl, A. and Willi, O. and Carroll, D.C. and Mckenna, Paul and Quinn, Mark and Yuan, Xiaohui and Gallegos, Pablo (2009) Observation of the transient charging of a laser-irradiated solid. European Physical Journal D: Atomic, Molecular, Optical and Plasma Physics, 55 (2). pp. 293-297. ISSN 1434-6060 (https://doi.org/10.1140/epjd/e2009-00079-7)

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Abstract

The proton radiography technique has been used to investigate the incidence of a 3 ×1019 W/cm2 infrared pulse with a 125 μm-diameter gold wire. The laser interaction is observed to drive the growth of a radial electric field ∼ 1010 V/m on the surface of the wire which rises and decays over a temporal window of 20 ps. Such studies of the ultrafast charging of a solid irradiated at high-intensity may be of relevance to schemes for laser-driven ion acceleration and the fast-ignitor concept for inertial confinement fusion.