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The physics of the transport of large currents of fast (relativistic) electrons in dense matter underpins many topics in high intensity laser-solid interactions, including warm dense matter, ion acceleration and the fast ignition approach to inertial confinement fusion. The propagation of fast electrons within the target is subject to transport instabilities (e.g. resistive instabilities) which give...
Applications of intense laser-dense plasma interactions such as the fast ignition approach to fusion and laser-driven ion acceleration depend on the generation and transport of large currents of energetic electrons. The efficiency of coupling laser energy into fast electrons is a key issue for these applications and is sensitive to the scale length of the preformed plasma, the extent of the underdense...
Electron beams and betatron X-ray radiation generated by laser wakefield acceleration in long plasma targets are studied. The targets consist of hydrogen filled dielectric capillary tubes of diameter 150 to 200 microns and length 6 to 20 mm. Electron beams are observed for peak laser intensities as low as 5×1017 W/cm2. It is found that the capillary collects energy outside the main peak of the focal...
In practice, video streaming over wireless network through home gateways requires bandwidth adaptation methods to deal with the fluctuation bandwidth the network. A popular method to compensate for temporary insufficient data throughput is dropping of B-frames. However, this method cannot be applied for encrypted commercial content, because frame types cannot be identified due to encryption of frame...
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