Observation of the transient charging of a laser-irradiated solid
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- Quinn, K., Wilson, P., Ramakrishna, B. et al. Eur. Phys. J. D (2009) 55: 293. doi:10.1140/epjd/e2009-00079-7
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.