Lateral electron transport in high-intensity laser-irradiated foils diagnosed by ion emission

McKenna, P. and Carroll, D. C. and Clarke, R. J. and Evans, R. G. and Ledingham, K. W. D. and Lindau, F. and Lundh, O. and McCanny, T. and Neely, D. and Robinson, A. P. L. and Robson, L. and Simpson, P. T. and Wahlstrom, C. -G. and Zepf, M. (2007) Lateral electron transport in high-intensity laser-irradiated foils diagnosed by ion emission. Physical Review Letters, 98 (14). p. 145001. ISSN 1079-7114 (https://doi.org/10.1103/PhysRevLett.98.145001)

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Abstract

An experimental investigation of lateral electron transport in thin metallic foil targets irradiated by ultraintense (>= 10(19) W/cm(2)) laser pulses is reported. Two-dimensional spatially resolved ion emission measurements are used to quantify electric-field generation resulting from electron transport. The measurement of large electric fields (similar to 0.1 TV/m) millimeters from the laser focus reveals that lateral energy transport continues long after the laser pulse has decayed. Numerical simulations confirm a very strong enhancement of electron density and electric field at the edges of the target.