Abstract

We investigate hot electron transport in foil, wedge, and cone targets irradiated with ultraintense femtosecond laser pulses by observing the transition radiation emitted from the targets rear side. Two-dimensional images and spectra of coherent transition radiation along with x-ray detection have revealed the spatial, temporal, and temperature characteristics of hot electron micropulses. Various patterns from different target and laser configurations suggest that hot electrons were guided by the strong static electromagnetic fields at the target boundary.

© 2008 Optical Society of America

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