Abstract
The transport of relativistic electrons, generated by the interaction of a high intensity (2×1020W∕cm2) laser, has been studied in a nail-like target comprised of a 20μm diameter solid copper wire, coated with ∼2μm of titanium, with an 80μm diameter hemispherical termination. A ∼500fs, ∼200J pulse of 1.053μm laser light produced by the Titan Laser at Lawrence Livermore National Laboratory was focused to a ∼20μm diameter spot centered on the flat face of the hemisphere. Kα fluorescence from the Cu and Ti regions was imaged together with extreme ultraviolet (XUV) emission at 68 and 256eV. Results showed a quasiexponential decline in Kα emission along the wire over a distance of a few hundred microns from the laser focus, consistent with bulk Ohmic inhibition of the relativistic electron transport. Weaker Kα and XUV emission on a longer scale length showed limb brightening suggesting a transition to enhanced transport at the surface of the wire.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
