ИСТИНА

Surface and volumetrically structured targets as an alternative to traditional solid or gas target ones are of great interest for laser triggered accelerations. The often used to increase the efficiency of laser energy transfer to charged particles. Nanograss(or nanowire) and nanosheet is one of the most promising structure. Electron acceleration from such targets irradiated by shot relativistic laser pulse have been studied with 2D and 3D PIC simulations We modeled structure as cylinder (or sheet) located on an irradiated flat target surface. Influence of various parameters of the structure on electron acceleration was evaluate and optimized, such as: average electron density, length and thickness. The performed calculations showed that the average and maximum electron energies can be significantly increased compared to an ordinary flat target. Also, the characteristic features of high-energy electrons motion in these structures are revealed.